Fix canPlayType() support for non-RFC compliant mp3 mimetype.

content/browser/media/media_canplaytype_browsertest.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 <string>
 
 #include "content/browser/media/media_browsertest.h"
 #include "content/public/test/browser_test_utils.h"
 #include "content/public/test/content_browser_test_utils.h"
 #include "content/shell/browser/shell.h"
@@ skipping 327 matching lines @@
             CanPlay("'application/ogg; codecs=\"opus, vorbis\"'"));
 
  TestOGGUnacceptableCombinations("application/ogg");
 }
 
 IN_PROC_BROWSER_TEST_F(MediaCanPlayTypeTest, CodecSupportTest_mp3) {
   EXPECT_EQ(kNot, CanPlay("'video/mp3'"));
   EXPECT_EQ(kNot, CanPlay("'video/mpeg'"));
   EXPECT_EQ(kNot, CanPlay("'video/x-mp3'"));
 
-  // audio/mpeg does not allow any codecs parameter
+  // audio/mpeg without a codecs parameter (RFC 3003 compliant)
   EXPECT_EQ(kPropProbably, CanPlay("'audio/mpeg'"));
 
+  // audio/mpeg with mp3 in codecs parameter. (Not RFC compliant, but
+  // very common in the wild so it is a defacto standard).
+  EXPECT_EQ(kPropProbably, CanPlay("'audio/mpeg; codecs=\"mp3\"'"));
+
   EXPECT_EQ(kNot, CanPlay("'audio/mpeg; codecs=\"avc1\"'"));
   EXPECT_EQ(kNot, CanPlay("'audio/mpeg; codecs=\"avc3\"'"));
 
   EXPECT_EQ(kNot, CanPlay("'audio/mpeg; codecs=\"avc1.4D401E\"'"));
   EXPECT_EQ(kNot, CanPlay("'audio/mpeg; codecs=\"avc3.64001F\"'"));
 
   EXPECT_EQ(kNot, CanPlay("'audio/mpeg; codecs=\"mp4a\"'"));
   EXPECT_EQ(kNot, CanPlay("'audio/mpeg; codecs=\"mp4a.40.2\"'"));
 
   TestMPEGUnacceptableCombinations("audio/mpeg");
@@ skipping 142 matching lines @@
             CanPlay("'application/vnd.apple.mpegurl; codecs=\"avc1.4D401E\"'"));
   EXPECT_EQ(canPlayHLS,
             CanPlay("'application/vnd.apple.mpegurl; codecs=\"avc3.64001F\"'"));
   EXPECT_EQ(canPlayHLS,
             CanPlay("'application/vnd.apple.mpegurl; codecs=\"mp4a.40.2\"'"));
 
   TestMPEGUnacceptableCombinations("application/vnd.apple.mpegurl");
 }
 
 }  // namespace content