Adding two test cases to ffmpeg_unittest from user bug reports.

media/ffmpeg/ffmpeg_unittest.cc

 // Copyright (c) 2010 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.
 
 // ffmpeg_unittests verify that the parts of the FFmpeg API that Chromium uses
 // function as advertised for each media format that Chromium supports.  This
 // mostly includes stuff like reporting proper timestamps, seeking to
 // keyframes, and supporting certain features like reordered_opaque.
 //
-// Known failures as of r53892:
+// Known failures as of r54591:
+//   http://crbug.com/47761
+//     crbug47761_ogg/FFmpegTest.Loop_Audio/0
+//     crbug47761_ogg/FFmpegTest.Seek_Audio/0
+//     crbug47761_ogg/FFmpegTest.Decode_Audio/0
+//
 //   http://crbug.com/49709
 //     sync1_ogg/FFmpegTest.Seek_Audio/0
 //     sync1_ogv/FFmpegTest.Seek_Audio/0
 //     sync2_ogg/FFmpegTest.Seek_Audio/0
 //     sync2_ogv/FFmpegTest.Seek_Audio/0
 //
 //   http://crbug.com/50457
 //     sync0_webm/FFmpegTest.Decode_Video/0
 //     sync0_webm/FFmpegTest.Duration/0
 //     sync1_webm/FFmpegTest.Decode_Video/0
@@ skipping 419 matching lines @@
 FFMPEG_TEST_CASE(sync2, m4a);
 FFMPEG_TEST_CASE(sync2, mp3);
 FFMPEG_TEST_CASE(sync2, mp4);
 FFMPEG_TEST_CASE(sync2, ogg);
 FFMPEG_TEST_CASE(sync2, ogv);
 FFMPEG_TEST_CASE(sync2, webm);
 
 // Covers our LayoutTest file.
 FFMPEG_TEST_CASE(counting, ogv);
 
+// The following are bugs reported by users.
+FFMPEG_TEST_CASE(crbug47761, ogg);
+FFMPEG_TEST_CASE(crbug50045, mp4);
+
 TEST_P(FFmpegTest, Perf) {
   {
     PerfTimeLogger timer("Opening file");
     OpenFile(GetParam());
   }
   {
     PerfTimeLogger timer("Opening codecs");
     OpenCodecs();
   }
   {
@@ skipping 177 matching lines @@
   SeekTo(0.4);
   ReadRemainingFile();
   EXPECT_TRUE(StepDecodeVideo());
   LOG(INFO) << decoded_video_time();
 
   CloseCodecs();
   CloseFile();
 }
 
 }  // namespace media