Wire up codec_delay() to MP3StreamParser and FFmpegAudioDecoder.

media/formats/mpeg/mp3_stream_parser_unittest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "media/formats/common/stream_parser_test_base.h"
 #include "media/formats/mpeg/mp3_stream_parser.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace media {
 
@@ skipping 22 matching lines @@
       "NewSegment"
       "{ 0K }"
       "{ 0K }"
       "{ 0K }"
       "EndOfSegment"
       "NewSegment"
       "{ 0K }"
       "{ 0K }"
       "EndOfSegment";
   EXPECT_EQ(expected, ParseFile("sfx.mp3", 17));
+  EXPECT_GT(last_audio_config_.codec_delay(), 0);
 }
 
 // Test parsing with a larger piece size to verify that multiple buffers
 // are passed to |new_buffer_cb_|.
 TEST_F(MP3StreamParserTest, UnalignedAppend512) {
   const std::string expected =
       "NewSegment"
       "{ 0K }"
       "{ 0K 26K 52K 78K }"
       "EndOfSegment"
       "NewSegment"
       "{ 0K 26K 52K }"
       "{ 0K 26K 52K 78K }"
       "{ 0K }"
       "EndOfSegment";
   EXPECT_EQ(expected, ParseFile("sfx.mp3", 512));
+  EXPECT_GT(last_audio_config_.codec_delay(), 0);
 }
 
 }  // namespace media