Fix unit test failures with estimated durations and splice frames.

media/base/audio_splicer.cc

Index: media/base/audio_splicer.cc
diff --git a/media/base/audio_splicer.cc b/media/base/audio_splicer.cc
index eac1c4924f6d121078e1cbb268d6e7aecaaa5320..b83765e76066bda8e93840f703371959344a6524 100644
--- a/media/base/audio_splicer.cc
+++ b/media/base/audio_splicer.cc
@@ -44,7 +44,8 @@ static void AccurateTrimStart(int frames_to_trim,
 static void AccurateTrimEnd(int frames_to_trim,
                             const scoped_refptr<AudioBuffer> buffer,
                             const AudioTimestampHelper& timestamp_helper) {
-  DCHECK(buffer->timestamp() == timestamp_helper.GetTimestamp());
+  DCHECK_LT(std::abs(timestamp_helper.GetFramesToTarget(buffer->timestamp())),
+            kMinGapSize);
   buffer->TrimEnd(frames_to_trim);
   buffer->set_duration(
       timestamp_helper.GetFrameDuration(buffer->frame_count()));