MediaRecorderHandler and WebmMuxer: add support for H264.

media/muxers/webm_muxer_unittest.cc

Index: media/muxers/webm_muxer_unittest.cc
diff --git a/media/muxers/webm_muxer_unittest.cc b/media/muxers/webm_muxer_unittest.cc
index 8c59d0a91e21639e4c6c92a882add29d88266b24..d71e0b9ff252d7783ac11d46bba5c5b6447058d9 100644
--- a/media/muxers/webm_muxer_unittest.cc
+++ b/media/muxers/webm_muxer_unittest.cc
@@ -237,13 +237,15 @@ TEST_P(WebmMuxerTest, VideoIsStoredWhileWaitingForAudio) {
 }
 
 const kTestParams kTestCases[] = {
-    // TODO: consider not enumerating every combination by hand.
     {kCodecVP8, 1 /* num_video_tracks */, 0 /*num_audio_tracks*/},
     {kCodecVP8, 0, 1},
     {kCodecVP8, 1, 1},
     {kCodecVP9, 1, 0},
     {kCodecVP9, 0, 1},
     {kCodecVP9, 1, 1},
+    {kCodecH264, 1, 0},
+    {kCodecH264, 0, 1},
+    {kCodecH264, 1, 1},
 };
 
 INSTANTIATE_TEST_CASE_P(, WebmMuxerTest, ValuesIn(kTestCases));