content_unittests mostly failing on chromium.memory/Linux TSan Tests

Builders failed on: 
- Linux TSan Tests: 
  https://build.chromium.org/p/chromium.memory/builders/Linux%20TSan%20Tests


First failure https://uberchromegw.corp.google.com/p/chromium.memory/builders/Linux%20TSan%20Tests/builds/9973

LogDog : chromium/bb/chromium.memory/Linux_TSan_Tests/9973/+/recipes/steps/content_unittests/0/logs/AudioRendererSinkCacheTest.NoGarbageCollectionForUsedSink/0

 [ RUN      ] AudioRendererSinkCacheTest.NoGarbageCollectionForUsedSink
GMOCK WARNING:
Uninteresting mock function call - returning directly.
    Function call: Stop()
NOTE: You can safely ignore the above warning unless this call should not happen.  Do not suppress it by blindly adding an EXPECT_CALL() if you don't mean to enforce the call.  See https://github.com/google/googletest/blob/master/googlemock/docs/CookBook.md#knowing-when-to-expect for details.
../../content/renderer/media/audio_renderer_sink_cache_unittest.cc:243: Failure
      Expected: 1
To be equal to: sink_count()
      Which is: 0
GMOCK WARNING:
Uninteresting mock function call - returning directly.
    Function call: Stop()
NOTE: You can safely ignore the above warning unless this call should not happen.  Do not suppress it by blindly adding an EXPECT_CALL() if you don't mean to enforce the call.  See https://github.com/google/googletest/blob/master/googlemock/docs/CookBook.md#knowing-when-to-expect for details.
[  FAILED  ] AudioRendererSinkCacheTest.NoGarbageCollectionForUsedSink (1619 ms)
[ RUN      ] AudioRendererSinkCacheTest.NoGarbageCollectionForUsedSink
GMOCK WARNING:
Uninteresting mock function call - returning directly.
    Function call: Stop()
NOTE: You can safely ignore the above warning unless this call should not happen.  Do not suppress it by blindly adding an EXPECT_CALL() if you don't mean to enforce the call.  See https://github.com/google/googletest/blob/master/googlemock/docs/CookBook.md#knowing-when-to-expect for details.
../../content/renderer/media/audio_renderer_sink_cache_unittest.cc:243: Failure
      Expected: 1
To be equal to: sink_count()
      Which is: 0
GMOCK WARNING:
Uninteresting mock function call - returning directly.
    Function call: Stop()
NOTE: You can safely ignore the above warning unless this call should not happen.  Do not suppress it by blindly adding an EXPECT_CALL() if you don't mean to enforce the call.  See https://github.com/google/googletest/blob/master/googlemock/docs/CookBook.md#knowing-when-to-expect for details.
[  FAILED  ] AudioRendererSinkCacheTest.NoGarbageCollectionForUsedSink (1151 ms)
[ RUN      ] AudioRendererSinkCacheTest.NoGarbageCollectionForUsedSink
GMOCK WARNING:
Uninteresting mock function call - returning directly.
    Function call: Stop()
NOTE: You can safely ignore the above warning unless this call should not happen.  Do not suppress it by blindly adding an EXPECT_CALL() if you don't mean to enforce the call.  See https://github.com/google/googletest/blob/master/googlemock/docs/CookBook.md#knowing-when-to-expect for details.
../../content/renderer/media/audio_renderer_sink_cache_unittest.cc:243: Failure
      Expected: 1
To be equal to: sink_count()
      Which is: 0
GMOCK WARNING:
Uninteresting mock function call - returning directly.
    Function call: Stop()
NOTE: You can safely ignore the above warning unless this call should not happen.  Do not suppress it by blindly adding an EXPECT_CALL() if you don't mean to enforce the call.  See https://github.com/google/googletest/blob/master/googlemock/docs/CookBook.md#knowing-when-to-expect for details.
[  FAILED  ] AudioRendererSinkCacheTest.NoGarbageCollectionForUsedSink (1155 ms)
[ RUN      ] AudioRendererSinkCacheTest.NoGarbageCollectionForUsedSink
GMOCK WARNING:
Uninteresting mock function call - returning directly.
    Function call: Stop()
NOTE: You can safely ignore the above warning unless this call should not happen.  Do not suppress it by blindly adding an EXPECT_CALL() if you don't mean to enforce the call.  See https://github.com/google/googletest/blob/master/googlemock/docs/CookBook.md#knowing-when-to-expect for details.
../../content/renderer/media/audio_renderer_sink_cache_unittest.cc:243: Failure
      Expected: 1
To be equal to: sink_count()
      Which is: 0
GMOCK WARNING:
Uninteresting mock function call - returning directly.
    Function call: Stop()
NOTE: You can safely ignore the above warning unless this call should not happen.  Do not suppress it by blindly adding an EXPECT_CALL() if you don't mean to enforce the call.  See https://github.com/google/googletest/blob/master/googlemock/docs/CookBook.md#knowing-when-to-expect for details.
[  FAILED  ] AudioRendererSinkCacheTest.NoGarbageCollectionForUsedSink (1158 ms)


may be retated to https://chromium-review.googlesource.com/c/549520