Failure: 

FAILED: android_clang_x86/obj/third_party/WebKit/Source/platform/heap/heap/StackFrameDepth.o 
/b/build/slave/cache/goma_client/gomacc ../../third_party/llvm-build/Release+Asserts/bin/clang++ -MMD -MF android_clang_x86/obj/third_party/WebKit/Source/platform/heap/heap/StackFrameDepth.o.d -DV8_DEPRECATION_WARNINGS -DNO_TCMALLOC -DSAFE_BROWSING_DB_REMOTE -DCHROMIUM_BUILD -DFIELDTRIAL_TESTING_ENABLED -D_FILE_OFFSET_BITS=64 -DANDROID -DHAVE_SYS_UIO_H -DANDROID_NDK_VERSION_ROLL=r12b_1 -DCR_CLANG_REVISION=\"318667-1\" -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__GNU_SOURCE=1 -DCHROMIUM_CXX_TWEAK_INLINES -D__compiler_offsetof=__builtin_offsetof -Dnan=__builtin_nan -D_DEBUG -DDYNAMIC_ANNOTATIONS_ENABLED=1 -DWTF_USE_DYNAMIC_ANNOTATIONS=1 -DBLINK_IMPLEMENTATION=1 -DINSIDE_BLINK -DWTF_USE_DYNAMIC_ANNOTATIONS=1 -DWTF_USE_LOW_QUALITY_IMAGE_INTERPOLATION=1 -DWTF_USE_WEBAUDIO_OPENMAX_DL_FFT=1 -DBLINK_PLATFORM_IMPLEMENTATION=1 -DU_USING_ICU_NAMESPACE=0 -DU_ENABLE_DYLOAD=0 -DU_STATIC_IMPLEMENTATION -DICU_UTIL_DATA_IMPL=ICU_UTIL_DATA_FILE -DUCHAR_TYPE=uint16_t -DV8_ENABLE_CHECKS -I../.. -Iandroid_clang_x86/gen -I../../third_party/WebKit/Source -I../../third_party/WebKit -Iandroid_clang_x86/gen/blink -Iandroid_clang_x86/gen/third_party/WebKit -I../../third_party/icu/source/common -I../../third_party/icu/source/i18n -I../../v8/include -Iandroid_clang_x86/gen/v8/include -fno-strict-aliasing --param=ssp-buffer-size=4 -fno-stack-protector -Wno-builtin-macro-redefined -D__DATE__= -D__TIME__= -D__TIMESTAMP__= -funwind-tables -fPIC -pipe -fcolor-diagnostics -no-canonical-prefixes -ffunction-sections -fno-short-enums --target=i686-linux-androideabi -m32 -msse2 -mfpmath=sse -mmmx -momit-leaf-frame-pointer -Wall -Werror -Wextra -Wno-missing-field-initializers -Wno-unused-parameter -Wno-c++11-narrowing -Wno-covered-switch-default -Wno-unneeded-internal-declaration -Wno-inconsistent-missing-override -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-tautological-unsigned-zero-compare -Wno-null-pointer-arithmetic -Wno-tautological-constant-compare -Wtautological-constant-out-of-range-compare -Oz -fno-ident -fdata-sections -ffunction-sections -fno-omit-frame-pointer -g1 -fdebug-info-for-profiling -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 check-ipc -Wheader-hygiene -Wstring-conversion -Wtautological-overlap-compare -Xclang -load -Xclang ../../third_party/llvm-build/Release+Asserts/lib/libBlinkGCPlugin.so -Xclang -add-plugin -Xclang blink-gc-plugin -Wglobal-constructors -Wno-undefined-bool-conversion -Wno-tautological-undefined-compare -std=gnu++14 -fno-exceptions -fno-rtti -isystem../../third_party/android_tools/ndk/sources/cxx-stl/llvm-libc++/libcxx/include -isystem../../third_party/android_tools/ndk/sources/cxx-stl/llvm-libc++abi/libcxxabi/include -isystem../../third_party/android_tools/ndk/sources/android/support/include --sysroot=../../third_party/android_tools/ndk/platforms/android-16/arch-x86 -fvisibility-inlines-hidden -c ../../third_party/WebKit/Source/platform/heap/StackFrameDepth.cpp -o android_clang_x86/obj/third_party/WebKit/Source/platform/heap/heap/StackFrameDepth.o
In file included from ../../third_party/WebKit/Source/platform/heap/StackFrameDepth.cpp:8:
In file included from ../../third_party/WebKit/public/platform/Platform.h:56:
In file included from ../../third_party/WebKit/public/platform/WebURLLoader.h:36:
../../third_party/WebKit/public/platform/WebURLRequest.h:41:10: fatal error: 'services/network/public/interfaces/request_context_frame_type.mojom-shared.h' file not found
#include "services/network/public/interfaces/request_context_frame_type.mojom-shared.h"
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.
[10394/54604] CXX clang_x64/obj/base/base/persistent_histogram_allocator.o
[10395/54604] CXX android_clang_x86/obj/third_party/WebKit/Source/platform/heap/heap/BlinkGCMemoryDumpProvider.o
FAILED: android_clang_x86/obj/third_party/WebKit/Source/platform/heap/heap/BlinkGCMemoryDumpProvider.o 
/b/build/slave/cache/goma_client/gomacc ../../third_party/llvm-build/Release+Asserts/bin/clang++ -MMD -MF android_clang_x86/obj/third_party/WebKit/Source/platform/heap/heap/BlinkGCMemoryDumpProvider.o.d -DV8_DEPRECATION_WARNINGS -DNO_TCMALLOC -DSAFE_BROWSING_DB_REMOTE -DCHROMIUM_BUILD -DFIELDTRIAL_TESTING_ENABLED -D_FILE_OFFSET_BITS=64 -DANDROID -DHAVE_SYS_UIO_H -DANDROID_NDK_VERSION_ROLL=r12b_1 -DCR_CLANG_REVISION=\"318667-1\" -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__GNU_SOURCE=1 -DCHROMIUM_CXX_TWEAK_INLINES -D__compiler_offsetof=__builtin_offsetof -Dnan=__builtin_nan -D_DEBUG -DDYNAMIC_ANNOTATIONS_ENABLED=1 -DWTF_USE_DYNAMIC_ANNOTATIONS=1 -DBLINK_IMPLEMENTATION=1 -DINSIDE_BLINK -DWTF_USE_DYNAMIC_ANNOTATIONS=1 -DWTF_USE_LOW_QUALITY_IMAGE_INTERPOLATION=1 -DWTF_USE_WEBAUDIO_OPENMAX_DL_FFT=1 -DBLINK_PLATFORM_IMPLEMENTATION=1 -DU_USING_ICU_NAMESPACE=0 -DU_ENABLE_DYLOAD=0 -DU_STATIC_IMPLEMENTATION -DICU_UTIL_DATA_IMPL=ICU_UTIL_DATA_FILE -DUCHAR_TYPE=uint16_t -DV8_ENABLE_CHECKS -I../.. -Iandroid_clang_x86/gen -I../../third_party/WebKit/Source -I../../third_party/WebKit -Iandroid_clang_x86/gen/blink -Iandroid_clang_x86/gen/third_party/WebKit -I../../third_party/icu/source/common -I../../third_party/icu/source/i18n -I../../v8/include -Iandroid_clang_x86/gen/v8/include -fno-strict-aliasing --param=ssp-buffer-size=4 -fno-stack-protector -Wno-builtin-macro-redefined -D__DATE__= -D__TIME__= -D__TIMESTAMP__= -funwind-tables -fPIC -pipe -fcolor-diagnostics -no-canonical-prefixes -ffunction-sections -fno-short-enums --target=i686-linux-androideabi -m32 -msse2 -mfpmath=sse -mmmx -momit-leaf-frame-pointer -Wall -Werror -Wextra -Wno-missing-field-initializers -Wno-unused-parameter -Wno-c++11-narrowing -Wno-covered-switch-default -Wno-unneeded-internal-declaration -Wno-inconsistent-missing-override -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-tautological-unsigned-zero-compare -Wno-null-pointer-arithmetic -Wno-tautological-constant-compare -Wtautological-constant-out-of-range-compare -Oz -fno-ident -fdata-sections -ffunction-sections -fno-omit-frame-pointer -g1 -fdebug-info-for-profiling -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 check-ipc -Wheader-hygiene -Wstring-conversion -Wtautological-overlap-compare -Xclang -load -Xclang ../../third_party/llvm-build/Release+Asserts/lib/libBlinkGCPlugin.so -Xclang -add-plugin -Xclang blink-gc-plugin -Wglobal-constructors -Wno-undefined-bool-conversion -Wno-tautological-undefined-compare -std=gnu++14 -fno-exceptions -fno-rtti -isystem../../third_party/android_tools/ndk/sources/cxx-stl/llvm-libc++/libcxx/include -isystem../../third_party/android_tools/ndk/sources/cxx-stl/llvm-libc++abi/libcxxabi/include -isystem../../third_party/android_tools/ndk/sources/android/support/include --sysroot=../../third_party/android_tools/ndk/platforms/android-16/arch-x86 -fvisibility-inlines-hidden -c ../../third_party/WebKit/Source/platform/heap/BlinkGCMemoryDumpProvider.cpp -o android_clang_x86/obj/third_party/WebKit/Source/platform/heap/heap/BlinkGCMemoryDumpProvider.o
In file included from ../../third_party/WebKit/Source/platform/heap/BlinkGCMemoryDumpProvider.cpp:17:
In file included from ../../third_party/WebKit/public/platform/Platform.h:56:
In file included from ../../third_party/WebKit/public/platform/WebURLLoader.h:36:
../../third_party/WebKit/public/platform/WebURLRequest.h:41:10: fatal error: 'services/network/public/interfaces/request_context_frame_type.mojom-shared.h' file not found
#include "services/network/public/interfaces/request_context_frame_type.mojom-shared.h"
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.
[10396/54604] CXX clang_x64/obj/base/base/global_descriptors.o
[10397/54604] CXX clang_x64/obj/base/base/field_trial_params.o
[10398/54604] CXX clang_x64/obj/base/base/process_handle_posix.o
[10399/54604] CXX android_clang_x86/obj/third_party/WebKit/Source/platform/heap/heap/HeapPage.o
FAILED: android_clang_x86/obj/third_party/WebKit/Source/platform/heap/heap/HeapPage.o 
/b/build/slave/cache/goma_client/gomacc ../../third_party/llvm-build/Release+Asserts/bin/clang++ -MMD -MF android_clang_x86/obj/third_party/WebKit/Source/platform/heap/heap/HeapPage.o.d -DV8_DEPRECATION_WARNINGS -DNO_TCMALLOC -DSAFE_BROWSING_DB_REMOTE -DCHROMIUM_BUILD -DFIELDTRIAL_TESTING_ENABLED -D_FILE_OFFSET_BITS=64 -DANDROID -DHAVE_SYS_UIO_H -DANDROID_NDK_VERSION_ROLL=r12b_1 -DCR_CLANG_REVISION=\"318667-1\" -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__GNU_SOURCE=1 -DCHROMIUM_CXX_TWEAK_INLINES -D__compiler_offsetof=__builtin_offsetof -Dnan=__builtin_nan -D_DEBUG -DDYNAMIC_ANNOTATIONS_ENABLED=1 -DWTF_USE_DYNAMIC_ANNOTATIONS=1 -DBLINK_IMPLEMENTATION=1 -DINSIDE_BLINK -DWTF_USE_DYNAMIC_ANNOTATIONS=1 -DWTF_USE_LOW_QUALITY_IMAGE_INTERPOLATION=1 -DWTF_USE_WEBAUDIO_OPENMAX_DL_FFT=1 -DBLINK_PLATFORM_IMPLEMENTATION=1 -DU_USING_ICU_NAMESPACE=0 -DU_ENABLE_DYLOAD=0 -DU_STATIC_IMPLEMENTATION -DICU_UTIL_DATA_IMPL=ICU_UTIL_DATA_FILE -DUCHAR_TYPE=uint16_t -DV8_ENABLE_CHECKS -I../.. -Iandroid_clang_x86/gen -I../../third_party/WebKit/Source -I../../third_party/WebKit -Iandroid_clang_x86/gen/blink -Iandroid_clang_x86/gen/third_party/WebKit -I../../third_party/icu/source/common -I../../third_party/icu/source/i18n -I../../v8/include -Iandroid_clang_x86/gen/v8/include -fno-strict-aliasing --param=ssp-buffer-size=4 -fno-stack-protector -Wno-builtin-macro-redefined -D__DATE__= -D__TIME__= -D__TIMESTAMP__= -funwind-tables -fPIC -pipe -fcolor-diagnostics -no-canonical-prefixes -ffunction-sections -fno-short-enums --target=i686-linux-androideabi -m32 -msse2 -mfpmath=sse -mmmx -momit-leaf-frame-pointer -Wall -Werror -Wextra -Wno-missing-field-initializers -Wno-unused-parameter -Wno-c++11-narrowing -Wno-covered-switch-default -Wno-unneeded-internal-declaration -Wno-inconsistent-missing-override -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-tautological-unsigned-zero-compare -Wno-null-pointer-arithmetic -Wno-tautological-constant-compare -Wtautological-constant-out-of-range-compare -Oz -fno-ident -fdata-sections -ffunction-sections -fno-omit-frame-pointer -g1 -fdebug-info-for-profiling -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 check-ipc -Wheader-hygiene -Wstring-conversion -Wtautological-overlap-compare -Xclang -load -Xclang ../../third_party/llvm-build/Release+Asserts/lib/libBlinkGCPlugin.so -Xclang -add-plugin -Xclang blink-gc-plugin -Wglobal-constructors -Wno-undefined-bool-conversion -Wno-tautological-undefined-compare -std=gnu++14 -fno-exceptions -fno-rtti -isystem../../third_party/android_tools/ndk/sources/cxx-stl/llvm-libc++/libcxx/include -isystem../../third_party/android_tools/ndk/sources/cxx-stl/llvm-libc++abi/libcxxabi/include -isystem../../third_party/android_tools/ndk/sources/android/support/include --sysroot=../../third_party/android_tools/ndk/platforms/android-16/arch-x86 -fvisibility-inlines-hidden -c ../../third_party/WebKit/Source/platform/heap/HeapPage.cpp -o android_clang_x86/obj/third_party/WebKit/Source/platform/heap/heap/HeapPage.o
In file included from ../../third_party/WebKit/Source/platform/heap/HeapPage.cpp:52:
In file included from ../../third_party/WebKit/public/platform/Platform.h:56:
In file included from ../../third_party/WebKit/public/platform/WebURLLoader.h:36:
../../third_party/WebKit/public/platform/WebURLRequest.h:41:10: fatal error: 'services/network/public/interfaces/request_context_frame_type.mojom-shared.h' file not found
#include "services/network/public/interfaces/request_context_frame_type.mojom-shared.h"
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.

-----------------------------------
Current suspect:
https://chromium-review.googlesource.com/c/chromium/src/+/791916
(a5b3a66158491e1dc9903c6632e8060fe81200a6)

Already reverted by  https://chromium.googlesource.com/chromium/src.git/+/5c02cf404aea00f1e495913fc64f5043e00e1047 on  issue 782528 #c4

Will leave this issue open until the tree is reopened

Tot is green, closing.