https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/Mac/42631

log:

FAILED: obj/third_party/blink/renderer/platform/scheduler/test_support/renderer_scheduler_test_support.o 
export DEVELOPER_DIR=/b/s/w/ir/cache/builder/src/build/mac_files/Xcode.app;  /b/s/w/ir/cache/goma/client/gomacc ../../third_party/llvm-build/Release+Asserts/bin/clang++ -MMD -MF obj/third_party/blink/renderer/platform/scheduler/test_support/renderer_scheduler_test_support.o.d -DV8_DEPRECATION_WARNINGS -DNO_TCMALLOC -DFULL_SAFE_BROWSING -DSAFE_BROWSING_CSD -DSAFE_BROWSING_DB_LOCAL -DCHROMIUM_BUILD -DFIELDTRIAL_TESTING_ENABLED -D_LIBCPP_HAS_NO_ALIGNED_ALLOCATION -DCR_XCODE_VERSION=0832 -DCR_CLANG_REVISION=\"334100-1\" -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D_FORTIFY_SOURCE=2 -D__ASSERT_MACROS_DEFINE_VERSIONS_WITHOUT_UNDERSCORE=0 -DNDEBUG -DNVALGRIND -DDYNAMIC_ANNOTATIONS_ENABLED=0 -DBLINK_IMPLEMENTATION=1 -DINSIDE_BLINK -DGTEST_API_= -DGTEST_HAS_POSIX_RE=0 -DGTEST_LANG_CXX11=1 -DGTEST_HAS_TR1_TUPLE=0 -DU_USING_ICU_NAMESPACE=0 -DU_ENABLE_DYLOAD=0 -DU_STATIC_IMPLEMENTATION -DICU_UTIL_DATA_IMPL=ICU_UTIL_DATA_FILE -DUCHAR_TYPE=uint16_t -I../.. -Igen -I../../third_party/googletest/custom -I../../third_party/googletest/src/googletest/include -I../../third_party/ced/src -I../../third_party/icu/source/common -I../../third_party/icu/source/i18n -fno-strict-aliasing -fstack-protector -Wno-builtin-macro-redefined -D__DATE__= -D__TIME__= -D__TIMESTAMP__= -fcolor-diagnostics -fmerge-all-constants -Xclang -mllvm -Xclang -instcombine-lower-dbg-declare=0 -no-canonical-prefixes -arch x86_64 -Wall -Werror -Wextra -Wimplicit-fallthrough -Wthread-safety -Wunguarded-availability -Wno-missing-field-initializers -Wno-unused-parameter -Wno-c++11-narrowing -Wno-covered-switch-default -Wno-unneeded-internal-declaration -Wno-undefined-var-template -Wno-address-of-packed-member -Wno-nonportable-include-path -Wno-user-defined-warnings -Wno-unused-lambda-capture -Wno-null-pointer-arithmetic -Wno-enum-compare-switch -Wno-ignored-pragma-optimize -O2 -fno-omit-frame-pointer -gdwarf-2 -isysroot ../../build/mac_files/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk -mmacosx-version-min=10.9.0 -fvisibility=hidden -Xclang -load -Xclang ../../third_party/llvm-build/Release+Asserts/lib/libFindBadConstructs.dylib -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 -Wheader-hygiene -Wstring-conversion -Wtautological-overlap-compare -Xclang -load -Xclang ../../third_party/llvm-build/Release+Asserts/lib/libBlinkGCPlugin.dylib -Xclang -add-plugin -Xclang blink-gc-plugin -std=c++14 -stdlib=libc++ -fno-exceptions -fno-rtti -fvisibility-inlines-hidden -c ../../third_party/blink/renderer/platform/scheduler/test/renderer_scheduler_test_support.cc -o obj/third_party/blink/renderer/platform/scheduler/test_support/renderer_scheduler_test_support.o
In file included from ../../third_party/blink/renderer/platform/scheduler/test/renderer_scheduler_test_support.cc:14:
In file included from ../../third_party/blink/renderer/platform/scheduler/main_thread/main_thread_scheduler_impl.h:32:
In file included from ../../third_party/blink/renderer/platform/scheduler/common/thread_scheduler_impl.h:12:
In file included from ../../third_party/blink/renderer/platform/scheduler/public/thread_scheduler.h:15:
In file included from ../../third_party/blink/renderer/platform/scheduler/public/page_scheduler.h:11:
In file included from ../../third_party/blink/renderer/platform/scheduler/public/frame_scheduler.h:12:
gen/third_party/blink/public/mojom/loader/pause_subresource_loading_handle.mojom-blink.h:28:10: fatal error: 'third_party/blink/public/mojom/loader/pause_subresource_loading_handle.mojom-shared.h' file not found
#include "third_party/blink/public/mojom/loader/pause_subresource_loading_handle.mojom-shared.h"

investigating as a possible build flake