Wire up codec_delay() to MP3StreamParser and FFmpegAudioDecoder.

media/formats/mpeg/mp3_stream_parser_unittest.cc

Index: media/formats/mpeg/mp3_stream_parser_unittest.cc
diff --git a/media/formats/mpeg/mp3_stream_parser_unittest.cc b/media/formats/mpeg/mp3_stream_parser_unittest.cc
index 85cc129fe158288d540c6b5c96f3babfc2788d87..8d532ab7262e2aac9d8698cff8585032f45f7929 100644
--- a/media/formats/mpeg/mp3_stream_parser_unittest.cc
+++ b/media/formats/mpeg/mp3_stream_parser_unittest.cc
@@ -40,6 +40,7 @@ TEST_F(MP3StreamParserTest, UnalignedAppend) {
       "{ 0K }"
       "EndOfSegment";
   EXPECT_EQ(expected, ParseFile("sfx.mp3", 17));
+  EXPECT_GT(last_audio_config_.codec_delay(), base::TimeDelta());
 }
 
 // Test parsing with a larger piece size to verify that multiple buffers
@@ -56,6 +57,7 @@ TEST_F(MP3StreamParserTest, UnalignedAppend512) {
       "{ 0K }"
       "EndOfSegment";
   EXPECT_EQ(expected, ParseFile("sfx.mp3", 512));
+  EXPECT_GT(last_audio_config_.codec_delay(), base::TimeDelta());
 }
 
 }  // namespace media