The ARM bot has been broken for quite some time now, and the build errors are beginning to accumulate.

gn args:
is_component_build = false
is_debug = false
strip_absolute_paths_from_debug_symbols = true
target_cpu = "arm"
use_goma = true

thomasanderson@thomasanderson:~/dev/chromium_2/src$ ninja -C out/arm -j2048 all -k10000
ninja: Entering directory `out/arm'
[1/1144] CC obj/native_client/src/trusted/service_runtime/sel/nacl_signal_arm.o
FAILED: obj/native_client/src/trusted/service_runtime/sel/nacl_signal_arm.o 
/usr/local/google/home/thomasanderson/goma/gomacc ../../third_party/llvm-build/Release+Asserts/bin/clang -MMD -MF obj/native_client/src/trusted/service_runtime/sel/nacl_signal_arm.o.d -DV8_DEPRECATION_WARNINGS -DUSE_UDEV -DUSE_AURA=1 -DUSE_GLIB=1 -DUSE_NSS_CERTS=1 -DUSE_X11=1 -DFULL_SAFE_BROWSING -DSAFE_BROWSING_CSD -DSAFE_BROWSING_DB_LOCAL -DCHROMIUM_BUILD -DFIELDTRIAL_TESTING_ENABLED -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -DCR_CLANG_REVISION=\"331747-1\" -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS -D_LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS -DCR_LIBCXX_REVISION=329375 -DCR_LIBCXXABI_REVISION=331450 -DCR_SYSROOT_HASH=b2165ab47ab9c4cc780db53ace1b08607d68ae31 -DNDEBUG -DNVALGRIND -DDYNAMIC_ANNOTATIONS_ENABLED=0 -D_POSIX_C_SOURCE=199506 -D_XOPEN_SOURCE=600 -D_GNU_SOURCE=1 -D__STDC_LIMIT_MACROS=1 -I../.. -Igen -fno-strict-aliasing --param=ssp-buffer-size=4 -fstack-protector -Wno-builtin-macro-redefined -D__DATE__= -D__TIME__= -D__TIMESTAMP__= -funwind-tables -fPIC -pipe -pthread -fcolor-diagnostics -fmerge-all-constants -fdebug-prefix-map=/usr/local/google/home/thomasanderson/dev/chromium_2/src/out/arm=. -no-canonical-prefixes --target=arm-linux-gnueabihf -march=armv7-a -mfloat-abi=hard -mtune=generic-armv7-a -mfpu=neon -mthumb -Wall -Werror -Wextra -Wimplicit-fallthrough -Wthread-safety -Wno-missing-field-initializers -Wno-unused-parameter -Wno-c++11-narrowing -Wno-covered-switch-default -Wno-unneeded-internal-declaration -Wno-undefined-var-template -Wno-nonportable-include-path -Wno-address-of-packed-member -Wno-unused-lambda-capture -Wno-user-defined-warnings -Wno-enum-compare-switch -Wno-null-pointer-arithmetic -Wno-ignored-pragma-optimize -O2 -fno-ident -fdata-sections -ffunction-sections -fno-omit-frame-pointer -g0 -fvisibility=hidden -Xclang -load -Xclang ../../third_party/llvm-build/Release+Asserts/lib/libFindBadConstructs.so -Xclang -add-plugin -Xclang find-bad-constructs -Xclang -plugin-arg-find-bad-constructs -Xclang enforce-in-thirdparty-webkit -Xclang -plugin-arg-find-bad-constructs -Xclang check-enum-max-value -Xclang -plugin-arg-find-bad-constructs -Xclang check-ipc -Wheader-hygiene -Wstring-conversion -Wtautological-overlap-compare -std=gnu11 --sysroot=../../build/linux/debian_sid_arm-sysroot -c ../../native_client/src/trusted/service_runtime/linux/nacl_signal_arm.c -o obj/native_client/src/trusted/service_runtime/sel/nacl_signal_arm.o
../../native_client/src/trusted/service_runtime/linux/nacl_signal_arm.c:20:22: error: incompatible pointer types initializing 'struct sigcontext *' with an expression of type 'mcontext_t *' [-Werror,-Wincompatible-pointer-types]
  struct sigcontext *mctx = &uctx->uc_mcontext;
                     ^      ~~~~~~~~~~~~~~~~~~
../../native_client/src/trusted/service_runtime/linux/nacl_signal_arm.c:52:22: error: incompatible pointer types initializing 'struct sigcontext *' with an expression of type 'mcontext_t *' [-Werror,-Wincompatible-pointer-types]
  struct sigcontext *mctx = &uctx->uc_mcontext;
                     ^      ~~~~~~~~~~~~~~~~~~
2 errors generated.
[2/1144] CXX obj/third_party/crashpad/crashpad/util/util/scoped_ptrace_attach.o
FAILED: obj/third_party/crashpad/crashpad/util/util/scoped_ptrace_attach.o 
/usr/local/google/home/thomasanderson/goma/gomacc ../../third_party/llvm-build/Release+Asserts/bin/clang++ -MMD -MF obj/third_party/crashpad/crashpad/util/util/scoped_ptrace_attach.o.d -DV8_DEPRECATION_WARNINGS -DUSE_UDEV -DUSE_AURA=1 -DUSE_GLIB=1 -DUSE_NSS_CERTS=1 -DUSE_X11=1 -DFULL_SAFE_BROWSING -DSAFE_BROWSING_CSD -DSAFE_BROWSING_DB_LOCAL -DCHROMIUM_BUILD -DFIELDTRIAL_TESTING_ENABLED -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -DCR_CLANG_REVISION=\"331747-1\" -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS -D_LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS -DCR_LIBCXX_REVISION=329375 -DCR_LIBCXXABI_REVISION=331450 -DCR_SYSROOT_HASH=b2165ab47ab9c4cc780db53ace1b08607d68ae31 -DNDEBUG -DNVALGRIND -DDYNAMIC_ANNOTATIONS_ENABLED=0 -DGLIB_VERSION_MAX_ALLOWED=GLIB_VERSION_2_32 -DGLIB_VERSION_MIN_REQUIRED=GLIB_VERSION_2_26 -DCRASHPAD_ZLIB_SOURCE_EXTERNAL -Igen/third_party/crashpad/crashpad -I../.. -Igen -I../../third_party/crashpad/crashpad -I../../third_party/crashpad/crashpad/compat/linux -I../../third_party/crashpad/crashpad/compat/non_win -I../../third_party/zlib -fno-strict-aliasing --param=ssp-buffer-size=4 -fstack-protector -Wno-builtin-macro-redefined -D__DATE__= -D__TIME__= -D__TIMESTAMP__= -funwind-tables -fPIC -pipe -pthread -fcolor-diagnostics -fmerge-all-constants -fdebug-prefix-map=/usr/local/google/home/thomasanderson/dev/chromium_2/src/out/arm=. -no-canonical-prefixes --target=arm-linux-gnueabihf -march=armv7-a -mfloat-abi=hard -mtune=generic-armv7-a -mfpu=neon -mthumb -Wall -Werror -Wextra -Wimplicit-fallthrough -Wthread-safety -Wno-missing-field-initializers -Wno-unused-parameter -Wno-c++11-narrowing -Wno-covered-switch-default -Wno-unneeded-internal-declaration -Wno-undefined-var-template -Wno-nonportable-include-path -Wno-address-of-packed-member -Wno-unused-lambda-capture -Wno-user-defined-warnings -Wno-enum-compare-switch -Wno-null-pointer-arithmetic -Wno-ignored-pragma-optimize -O2 -fno-ident -fdata-sections -ffunction-sections -fno-omit-frame-pointer -g0 -fvisibility=hidden -Xclang -load -Xclang ../../third_party/llvm-build/Release+Asserts/lib/libFindBadConstructs.so -Xclang -add-plugin -Xclang find-bad-constructs -Xclang -plugin-arg-find-bad-constructs -Xclang enforce-in-thirdparty-webkit -Xclang -plugin-arg-find-bad-constructs -Xclang check-enum-max-value -Xclang -plugin-arg-find-bad-constructs -Xclang check-ipc -Wheader-hygiene -Wstring-conversion -Wtautological-overlap-compare -isystem../../build/linux/debian_sid_arm-sysroot/usr/include/glib-2.0 -isystem../../build/linux/debian_sid_arm-sysroot/usr/lib/arm-linux-gnueabihf/glib-2.0/include -std=gnu++14 -fno-exceptions -fno-rtti -nostdinc++ -isystem../../buildtools/third_party/libc++/trunk/include -isystem../../buildtools/third_party/libc++abi/trunk/include --sysroot=../../build/linux/debian_sid_arm-sysroot -fvisibility-inlines-hidden -c ../../third_party/crashpad/crashpad/util/linux/scoped_ptrace_attach.cc -o obj/third_party/crashpad/crashpad/util/util/scoped_ptrace_attach.o
In file included from ../../third_party/crashpad/crashpad/util/linux/scoped_ptrace_attach.cc:17:
../../third_party/crashpad/crashpad/compat/linux/sys/ptrace.h:39:35: error: redefinition of 'PTRACE_GETVFPREGS' as different kind of symbol
static constexpr __ptrace_request PTRACE_GETVFPREGS =
                                  ^
../../build/linux/debian_sid_arm-sysroot/usr/include/arm-linux-gnueabihf/sys/ptrace.h:126:3: note: previous definition is here
  PTRACE_GETVFPREGS = 27,
  ^
1 error generated.
[3/1144] CXX obj/sandbox/sandbox_ipc_fuzzer/crosscall_server.o
FAILED: obj/sandbox/sandbox_ipc_fuzzer/crosscall_server.o 
/usr/local/google/home/thomasanderson/goma/gomacc ../../third_party/llvm-build/Release+Asserts/bin/clang++ -MMD -MF obj/sandbox/sandbox_ipc_fuzzer/crosscall_server.o.d -DSANDBOX_FUZZ_TARGET -DV8_DEPRECATION_WARNINGS -DUSE_UDEV -DUSE_AURA=1 -DUSE_GLIB=1 -DUSE_NSS_CERTS=1 -DUSE_X11=1 -DFULL_SAFE_BROWSING -DSAFE_BROWSING_CSD -DSAFE_BROWSING_DB_LOCAL -DCHROMIUM_BUILD -DFIELDTRIAL_TESTING_ENABLED -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -DCR_CLANG_REVISION=\"331747-1\" -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS -D_LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS -DCR_LIBCXX_REVISION=329375 -DCR_LIBCXXABI_REVISION=331450 -DCR_SYSROOT_HASH=b2165ab47ab9c4cc780db53ace1b08607d68ae31 -DNDEBUG -DNVALGRIND -DDYNAMIC_ANNOTATIONS_ENABLED=0 -DGLIB_VERSION_MAX_ALLOWED=GLIB_VERSION_2_32 -DGLIB_VERSION_MIN_REQUIRED=GLIB_VERSION_2_26 -I../.. -Igen -fno-strict-aliasing --param=ssp-buffer-size=4 -fstack-protector -Wno-builtin-macro-redefined -D__DATE__= -D__TIME__= -D__TIMESTAMP__= -funwind-tables -fPIC -pipe -pthread -fcolor-diagnostics -fmerge-all-constants -fdebug-prefix-map=/usr/local/google/home/thomasanderson/dev/chromium_2/src/out/arm=. -no-canonical-prefixes --target=arm-linux-gnueabihf -march=armv7-a -mfloat-abi=hard -mtune=generic-armv7-a -mfpu=neon -mthumb -Wall -Werror -Wextra -Wimplicit-fallthrough -Wthread-safety -Wno-missing-field-initializers -Wno-unused-parameter -Wno-c++11-narrowing -Wno-covered-switch-default -Wno-unneeded-internal-declaration -Wno-undefined-var-template -Wno-nonportable-include-path -Wno-address-of-packed-member -Wno-unused-lambda-capture -Wno-user-defined-warnings -Wno-enum-compare-switch -Wno-null-pointer-arithmetic -Wno-ignored-pragma-optimize -O2 -fno-ident -fdata-sections -ffunction-sections -fno-omit-frame-pointer -g0 -fvisibility=hidden -Xclang -load -Xclang ../../third_party/llvm-build/Release+Asserts/lib/libFindBadConstructs.so -Xclang -add-plugin -Xclang find-bad-constructs -Xclang -plugin-arg-find-bad-constructs -Xclang enforce-in-thirdparty-webkit -Xclang -plugin-arg-find-bad-constructs -Xclang check-enum-max-value -Xclang -plugin-arg-find-bad-constructs -Xclang check-ipc -Wheader-hygiene -Wstring-conversion -Wtautological-overlap-compare -isystem../../build/linux/debian_sid_arm-sysroot/usr/include/glib-2.0 -isystem../../build/linux/debian_sid_arm-sysroot/usr/lib/arm-linux-gnueabihf/glib-2.0/include -std=gnu++14 -fno-exceptions -fno-rtti -nostdinc++ -isystem../../buildtools/third_party/libc++/trunk/include -isystem../../buildtools/third_party/libc++abi/trunk/include --sysroot=../../build/linux/debian_sid_arm-sysroot -fvisibility-inlines-hidden -c ../../sandbox/win/src/crosscall_server.cc -o obj/sandbox/sandbox_ipc_fuzzer/crosscall_server.o
In file included from ../../sandbox/win/src/crosscall_server.cc:16:
../../sandbox/win/src/crosscall_client.h:153:17: error: calling convention '__cdecl' ignored for this target [-Werror,-Wignored-attributes]
  static size_t __cdecl StringLength(const wchar_t* wcs) {
                ^
1 error generated.
[4/1144] CXX obj/third_party/crashpad/crashpad/util/util/ptracer.o
FAILED: obj/third_party/crashpad/crashpad/util/util/ptracer.o 
/usr/local/google/home/thomasanderson/goma/gomacc ../../third_party/llvm-build/Release+Asserts/bin/clang++ -MMD -MF obj/third_party/crashpad/crashpad/util/util/ptracer.o.d -DV8_DEPRECATION_WARNINGS -DUSE_UDEV -DUSE_AURA=1 -DUSE_GLIB=1 -DUSE_NSS_CERTS=1 -DUSE_X11=1 -DFULL_SAFE_BROWSING -DSAFE_BROWSING_CSD -DSAFE_BROWSING_DB_LOCAL -DCHROMIUM_BUILD -DFIELDTRIAL_TESTING_ENABLED -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -DCR_CLANG_REVISION=\"331747-1\" -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS -D_LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS -DCR_LIBCXX_REVISION=329375 -DCR_LIBCXXABI_REVISION=331450 -DCR_SYSROOT_HASH=b2165ab47ab9c4cc780db53ace1b08607d68ae31 -DNDEBUG -DNVALGRIND -DDYNAMIC_ANNOTATIONS_ENABLED=0 -DGLIB_VERSION_MAX_ALLOWED=GLIB_VERSION_2_32 -DGLIB_VERSION_MIN_REQUIRED=GLIB_VERSION_2_26 -DCRASHPAD_ZLIB_SOURCE_EXTERNAL -Igen/third_party/crashpad/crashpad -I../.. -Igen -I../../third_party/crashpad/crashpad -I../../third_party/crashpad/crashpad/compat/linux -I../../third_party/crashpad/crashpad/compat/non_win -I../../third_party/zlib -fno-strict-aliasing --param=ssp-buffer-size=4 -fstack-protector -Wno-builtin-macro-redefined -D__DATE__= -D__TIME__= -D__TIMESTAMP__= -funwind-tables -fPIC -pipe -pthread -fcolor-diagnostics -fmerge-all-constants -fdebug-prefix-map=/usr/local/google/home/thomasanderson/dev/chromium_2/src/out/arm=. -no-canonical-prefixes --target=arm-linux-gnueabihf -march=armv7-a -mfloat-abi=hard -mtune=generic-armv7-a -mfpu=neon -mthumb -Wall -Werror -Wextra -Wimplicit-fallthrough -Wthread-safety -Wno-missing-field-initializers -Wno-unused-parameter -Wno-c++11-narrowing -Wno-covered-switch-default -Wno-unneeded-internal-declaration -Wno-undefined-var-template -Wno-nonportable-include-path -Wno-address-of-packed-member -Wno-unused-lambda-capture -Wno-user-defined-warnings -Wno-enum-compare-switch -Wno-null-pointer-arithmetic -Wno-ignored-pragma-optimize -O2 -fno-ident -fdata-sections -ffunction-sections -fno-omit-frame-pointer -g0 -fvisibility=hidden -Xclang -load -Xclang ../../third_party/llvm-build/Release+Asserts/lib/libFindBadConstructs.so -Xclang -add-plugin -Xclang find-bad-constructs -Xclang -plugin-arg-find-bad-constructs -Xclang enforce-in-thirdparty-webkit -Xclang -plugin-arg-find-bad-constructs -Xclang check-enum-max-value -Xclang -plugin-arg-find-bad-constructs -Xclang check-ipc -Wheader-hygiene -Wstring-conversion -Wtautological-overlap-compare -isystem../../build/linux/debian_sid_arm-sysroot/usr/include/glib-2.0 -isystem../../build/linux/debian_sid_arm-sysroot/usr/lib/arm-linux-gnueabihf/glib-2.0/include -std=gnu++14 -fno-exceptions -fno-rtti -nostdinc++ -isystem../../buildtools/third_party/libc++/trunk/include -isystem../../buildtools/third_party/libc++abi/trunk/include --sysroot=../../build/linux/debian_sid_arm-sysroot -fvisibility-inlines-hidden -c ../../third_party/crashpad/crashpad/util/linux/ptracer.cc -o obj/third_party/crashpad/crashpad/util/util/ptracer.o
In file included from ../../third_party/crashpad/crashpad/util/linux/ptracer.cc:20:
../../third_party/crashpad/crashpad/compat/linux/sys/ptrace.h:39:35: error: redefinition of 'PTRACE_GETVFPREGS' as different kind of symbol
static constexpr __ptrace_request PTRACE_GETVFPREGS =
                                  ^
../../build/linux/debian_sid_arm-sysroot/usr/include/arm-linux-gnueabihf/sys/ptrace.h:126:3: note: previous definition is here
  PTRACE_GETVFPREGS = 27,
  ^
1 error generated.
[5/1144] CXX obj/third_party/crashpad/crashpad/util/util_test/scoped_ptrace_attach_test.o
FAILED: obj/third_party/crashpad/crashpad/util/util_test/scoped_ptrace_attach_test.o 
/usr/local/google/home/thomasanderson/goma/gomacc ../../third_party/llvm-build/Release+Asserts/bin/clang++ -MMD -MF obj/third_party/crashpad/crashpad/util/util_test/scoped_ptrace_attach_test.o.d -DV8_DEPRECATION_WARNINGS -DUSE_UDEV -DUSE_AURA=1 -DUSE_GLIB=1 -DUSE_NSS_CERTS=1 -DUSE_X11=1 -DFULL_SAFE_BROWSING -DSAFE_BROWSING_CSD -DSAFE_BROWSING_DB_LOCAL -DCHROMIUM_BUILD -DFIELDTRIAL_TESTING_ENABLED -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -DCR_CLANG_REVISION=\"331747-1\" -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS -D_LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS -DCR_LIBCXX_REVISION=329375 -DCR_LIBCXXABI_REVISION=331450 -DCR_SYSROOT_HASH=b2165ab47ab9c4cc780db53ace1b08607d68ae31 -DNDEBUG -DNVALGRIND -DDYNAMIC_ANNOTATIONS_ENABLED=0 -DGLIB_VERSION_MAX_ALLOWED=GLIB_VERSION_2_32 -DGLIB_VERSION_MIN_REQUIRED=GLIB_VERSION_2_26 -DGTEST_API_= -DGTEST_HAS_POSIX_RE=0 -DGTEST_LANG_CXX11=1 -DGTEST_HAS_TR1_TUPLE=0 -DUNIT_TEST -DCRASHPAD_ZLIB_SOURCE_EXTERNAL -I../.. -Igen -I../../third_party/googletest/custom -I../../third_party/googletest/src/googletest/include -I../../third_party/crashpad/crashpad -I../../third_party/crashpad/crashpad/compat/linux -I../../third_party/crashpad/crashpad/compat/non_win -I../../third_party/googletest/custom -I../../third_party/googletest/src/googlemock/include -I../../third_party/zlib -fno-strict-aliasing --param=ssp-buffer-size=4 -fstack-protector -Wno-builtin-macro-redefined -D__DATE__= -D__TIME__= -D__TIMESTAMP__= -funwind-tables -fPIC -pipe -pthread -fcolor-diagnostics -fmerge-all-constants -fdebug-prefix-map=/usr/local/google/home/thomasanderson/dev/chromium_2/src/out/arm=. -no-canonical-prefixes --target=arm-linux-gnueabihf -march=armv7-a -mfloat-abi=hard -mtune=generic-armv7-a -mfpu=neon -mthumb -Wall -Werror -Wextra -Wimplicit-fallthrough -Wthread-safety -Wno-missing-field-initializers -Wno-unused-parameter -Wno-c++11-narrowing -Wno-covered-switch-default -Wno-unneeded-internal-declaration -Wno-undefined-var-template -Wno-nonportable-include-path -Wno-address-of-packed-member -Wno-unused-lambda-capture -Wno-user-defined-warnings -Wno-enum-compare-switch -Wno-null-pointer-arithmetic -Wno-ignored-pragma-optimize -O2 -fno-ident -fdata-sections -ffunction-sections -fno-omit-frame-pointer -g0 -fvisibility=hidden -Xclang -load -Xclang ../../third_party/llvm-build/Release+Asserts/lib/libFindBadConstructs.so -Xclang -add-plugin -Xclang find-bad-constructs -Xclang -plugin-arg-find-bad-constructs -Xclang enforce-in-thirdparty-webkit -Xclang -plugin-arg-find-bad-constructs -Xclang check-enum-max-value -Xclang -plugin-arg-find-bad-constructs -Xclang check-ipc -Wheader-hygiene -Wstring-conversion -Wtautological-overlap-compare -isystem../../build/linux/debian_sid_arm-sysroot/usr/include/glib-2.0 -isystem../../build/linux/debian_sid_arm-sysroot/usr/lib/arm-linux-gnueabihf/glib-2.0/include -Wno-inconsistent-missing-override -std=gnu++14 -fno-exceptions -fno-rtti -nostdinc++ -isystem../../buildtools/third_party/libc++/trunk/include -isystem../../buildtools/third_party/libc++abi/trunk/include --sysroot=../../build/linux/debian_sid_arm-sysroot -fvisibility-inlines-hidden -c ../../third_party/crashpad/crashpad/util/linux/scoped_ptrace_attach_test.cc -o obj/third_party/crashpad/crashpad/util/util_test/scoped_ptrace_attach_test.o
In file included from ../../third_party/crashpad/crashpad/util/linux/scoped_ptrace_attach_test.cc:18:
../../third_party/crashpad/crashpad/compat/linux/sys/ptrace.h:39:35: error: redefinition of 'PTRACE_GETVFPREGS' as different kind of symbol
static constexpr __ptrace_request PTRACE_GETVFPREGS =
                                  ^
../../build/linux/debian_sid_arm-sysroot/usr/include/arm-linux-gnueabihf/sys/ptrace.h:126:3: note: previous definition is here
  PTRACE_GETVFPREGS = 27,
  ^
1 error generated.
[6/1144] CXX obj/components/crash/content/app/app/breakpad_linux.o
FAILED: obj/components/crash/content/app/app/breakpad_linux.o 
/usr/local/google/home/thomasanderson/goma/gomacc ../../third_party/llvm-build/Release+Asserts/bin/clang++ -MMD -MF obj/components/crash/content/app/app/breakpad_linux.o.d -DCRASH_IMPLEMENTATION -DV8_DEPRECATION_WARNINGS -DUSE_UDEV -DUSE_AURA=1 -DUSE_GLIB=1 -DUSE_NSS_CERTS=1 -DUSE_X11=1 -DFULL_SAFE_BROWSING -DSAFE_BROWSING_CSD -DSAFE_BROWSING_DB_LOCAL -DCHROMIUM_BUILD -DFIELDTRIAL_TESTING_ENABLED -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -DCR_CLANG_REVISION=\"331747-1\" -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS -D_LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS -DCR_LIBCXX_REVISION=329375 -DCR_LIBCXXABI_REVISION=331450 -DCR_SYSROOT_HASH=b2165ab47ab9c4cc780db53ace1b08607d68ae31 -DNDEBUG -DNVALGRIND -DDYNAMIC_ANNOTATIONS_ENABLED=0 -DGLIB_VERSION_MAX_ALLOWED=GLIB_VERSION_2_32 -DGLIB_VERSION_MIN_REQUIRED=GLIB_VERSION_2_26 -DV8_USE_EXTERNAL_STARTUP_DATA -I../.. -Igen -I../../third_party/crashpad/crashpad -I../../third_party/crashpad/crashpad/compat/linux -I../../third_party/crashpad/crashpad/compat/non_win -I../../third_party/breakpad/breakpad/src -fno-strict-aliasing --param=ssp-buffer-size=4 -fstack-protector -Wno-builtin-macro-redefined -D__DATE__= -D__TIME__= -D__TIMESTAMP__= -funwind-tables -fPIC -pipe -pthread -fcolor-diagnostics -fmerge-all-constants -fdebug-prefix-map=/usr/local/google/home/thomasanderson/dev/chromium_2/src/out/arm=. -no-canonical-prefixes --target=arm-linux-gnueabihf -march=armv7-a -mfloat-abi=hard -mtune=generic-armv7-a -mfpu=neon -mthumb -Wall -Werror -Wextra -Wimplicit-fallthrough -Wthread-safety -Wno-missing-field-initializers -Wno-unused-parameter -Wno-c++11-narrowing -Wno-covered-switch-default -Wno-unneeded-internal-declaration -Wno-undefined-var-template -Wno-nonportable-include-path -Wno-address-of-packed-member -Wno-unused-lambda-capture -Wno-user-defined-warnings -Wno-enum-compare-switch -Wno-null-pointer-arithmetic -Wno-ignored-pragma-optimize -O2 -fno-ident -fdata-sections -ffunction-sections -fno-omit-frame-pointer -g0 -fvisibility=hidden -Xclang -load -Xclang ../../third_party/llvm-build/Release+Asserts/lib/libFindBadConstructs.so -Xclang -add-plugin -Xclang find-bad-constructs -Xclang -plugin-arg-find-bad-constructs -Xclang enforce-in-thirdparty-webkit -Xclang -plugin-arg-find-bad-constructs -Xclang check-enum-max-value -Xclang -plugin-arg-find-bad-constructs -Xclang check-ipc -Wheader-hygiene -Wstring-conversion -Wtautological-overlap-compare -isystem../../build/linux/debian_sid_arm-sysroot/usr/include/glib-2.0 -isystem../../build/linux/debian_sid_arm-sysroot/usr/lib/arm-linux-gnueabihf/glib-2.0/include -std=gnu++14 -fno-exceptions -fno-rtti -nostdinc++ -isystem../../buildtools/third_party/libc++/trunk/include -isystem../../buildtools/third_party/libc++abi/trunk/include --sysroot=../../build/linux/debian_sid_arm-sysroot -fvisibility-inlines-hidden -c ../../components/crash/content/app/breakpad_linux.cc -o obj/components/crash/content/app/app/breakpad_linux.o
In file included from ../../components/crash/content/app/breakpad_linux.cc:48:
In file included from ../../third_party/breakpad/breakpad/src/client/linux/handler/exception_handler.h:42:
In file included from ../../third_party/breakpad/breakpad/src/client/linux/minidump_writer/minidump_writer.h:41:
In file included from ../../third_party/breakpad/breakpad/src/client/linux/minidump_writer/linux_dumper.h:51:
In file included from ../../third_party/breakpad/breakpad/src/client/linux/dump_writer_common/thread_info.h:37:
In file included from ../../third_party/breakpad/breakpad/src/common/memory_allocator.h:50:
In file included from ../../third_party/lss/linux_syscall_support.h:111:
../../third_party/crashpad/crashpad/compat/linux/sys/ptrace.h:39:35: error: redefinition of 'PTRACE_GETVFPREGS' as different kind of symbol
static constexpr __ptrace_request PTRACE_GETVFPREGS =
                                  ^
../../build/linux/debian_sid_arm-sysroot/usr/include/arm-linux-gnueabihf/sys/ptrace.h:126:3: note: previous definition is here
  PTRACE_GETVFPREGS = 27,
  ^
1 error generated.
ninja: build stopped: cannot make progress due to previous errors.