Link to Builds:
===============
https://uberchromegw.corp.google.com/i/official.desktop.continuous/builders/mac%20trunk/builds/46153

Link to Log File:
=================
https://uberchromegw.corp.google.com/i/official.desktop.continuous/builders/mac%20trunk/builds/46153/steps/compile/logs/stdio

Error from the Log:
===================
FAILED: obj/third_party/crashpad/crashpad/handler/handler_lib/handler_main.o 
export DEVELOPER_DIR=/b/build/slave/mac_trunk/build/src/build/mac_files/Xcode.app;  ../../third_party/llvm-build/Release+Asserts/bin/clang++ -MMD -MF obj/third_party/crashpad/crashpad/handler/handler_lib/handler_main.o.d -DV8_DEPRECATION_WARNINGS -DNO_TCMALLOC -DUSE_EXTERNAL_POPUP_MENU=1 -DFULL_SAFE_BROWSING -DSAFE_BROWSING_CSD -DSAFE_BROWSING_DB_LOCAL -DOFFICIAL_BUILD -DGOOGLE_CHROME_BUILD -DENABLE_MEDIA_ROUTER=1 -DCR_CLANG_REVISION=\"289944-2\" -DCR_XCODE_VERSION=0511 -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 -I../../third_party/crashpad/crashpad -I../.. -Igen -I../../third_party/crashpad/crashpad/compat/non_win -I../../third_party/crashpad/crashpad/compat/mac -I../../third_party/crashpad/crashpad/compat/non_cxx11_lib -fno-strict-aliasing -fstack-protector -fcolor-diagnostics -arch x86_64 -Wall -Werror -Wextra -Wpartial-availability -Wno-missing-field-initializers -Wno-unused-parameter -Wno-c++11-narrowing -Wno-covered-switch-default -Wno-deprecated-register -Wno-unneeded-internal-declaration -Wno-inconsistent-missing-override -Wno-shift-negative-value -Wno-undefined-var-template -Wno-nonportable-include-path -Wno-address-of-packed-member -Wno-block-capture-autoreleasing -O2 -gdwarf-2 -fno-standalone-debug -isysroot /b/build/slave/mac_trunk/build/src/build/mac_files/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk -mmacosx-version-min=10.9 -fvisibility=hidden -Xclang -load -Xclang ../../third_party/llvm-build/Release+Asserts/lib/libFindBadConstructs.dylib -Xclang -add-plugin -Xclang find-bad-constructs -Wheader-hygiene -Wstring-conversion -Wtautological-overlap-compare -fvisibility-inlines-hidden -std=c++11 -stdlib=libc++ -fno-rtti -fno-exceptions -c ../../third_party/crashpad/crashpad/handler/handler_main.cc -o obj/third_party/crashpad/crashpad/handler/handler_lib/handler_main.o
../../third_party/crashpad/crashpad/handler/handler_main.cc:166:7: error: unused variable 'rv' [-Werror,-Wunused-variable]
  int rv = sigaction(sig, &sa, nullptr);
      ^
../../third_party/crashpad/crashpad/handler/handler_main.cc:241:9: error: unused variable 'rv' [-Werror,-Wunused-variable]
    int rv = raise(sig);
        ^
../../third_party/crashpad/crashpad/handler/handler_main.cc:254:7: error: unused variable 'rv' [-Werror,-Wunused-variable]
  int rv = raise(sig);
      ^
Suspecting below change could be a possible culprit:

https://chromium.googlesource.com/chromium/src/+/c4d7eaed0fcac839f1fd4f2a763bcb1ee52fd227

@ mark: Kindly look into it. Please help us to find an owner of not with respect to your change.

Thanks.!