media: Suppress spurious gtest emission from SRC= pipeline fuzzer

From local inspection, it appears the only spurious
media_pipeline_integration_fuzzer gtest expectation failure emission is
when PipelineIntegrationTestBase::OnSeeked() is called with an
expectation of seek time of 0, but an actual seek time sometimes slightly > 0.

Since the FFmpegDemuxerStream start time logic and the decoder output
may both mess with the actual result of a seek to start time, this
change relaxes the seek time verification when fuzzing.

Also, this appears to be the last known spurious gtest emission from any
of the media*_pipeline_integration_fuzzers, so the general
"close_fd_mask=1" suppression is also removed from the fuzzer's
BUILD.gn target.

If other spurius gtest emissions occur, please file a new crbug so we
can target specific suppressions or fixes appropriately.

BUG=894460
R=sandersd@chromium.org
CC=metzman@chromium.org

Change-Id: I7e6ac3f3b8b27852cdb826371eccafcbc99b4ee9
Reviewed-on: https://chromium-review.googlesource.com/c/1377138
Commit-Queue: Matthew Wolenetz <wolenetz@chromium.org>
Reviewed-by: Dan Sanders <sandersd@chromium.org>
Cr-Commit-Position: refs/heads/master@{#616517}
4 files changed