Add support for audio/{x-}mpegurl mime type for HLS.

media/base/mime_util_unittest.cc

Index: media/base/mime_util_unittest.cc
diff --git a/media/base/mime_util_unittest.cc b/media/base/mime_util_unittest.cc
index 714536822b5e22adac0dd4ad2c11125cc210c0a6..10e4aec1194175521bab7d9e8a9346a1ee5ecc66 100644
--- a/media/base/mime_util_unittest.cc
+++ b/media/base/mime_util_unittest.cc
@@ -146,6 +146,8 @@ TEST(MimeUtilTest, CommonMediaMimeType) {
   EXPECT_EQ(kHlsSupported, IsSupportedMediaMimeType("Application/X-MPEGURL"));
   EXPECT_EQ(kHlsSupported, IsSupportedMediaMimeType(
       "application/vnd.apple.mpegurl"));
+  EXPECT_EQ(kHlsSupported, IsSupportedMediaMimeType("audio/mpegurl"));
+  EXPECT_EQ(kHlsSupported, IsSupportedMediaMimeType("audio/x-mpegurl"));
 
 #if defined(USE_PROPRIETARY_CODECS)
   EXPECT_TRUE(IsSupportedMediaMimeType("audio/mp4"));
@@ -428,6 +430,10 @@ TEST(IsCodecSupportedOnPlatformTest, HLSDoesNotSupportMPEG2AAC) {
             MimeUtil::MPEG2_AAC, "application/x-mpegurl", false, info));
         EXPECT_FALSE(MimeUtil::IsCodecSupportedOnPlatform(
             MimeUtil::MPEG2_AAC, "application/vnd.apple.mpegurl", false, info));
+        EXPECT_FALSE(MimeUtil::IsCodecSupportedOnPlatform(
+            MimeUtil::MPEG2_AAC, "audio/mpegurl", false, info));
+        EXPECT_FALSE(MimeUtil::IsCodecSupportedOnPlatform(
+            MimeUtil::MPEG2_AAC, "audio/x-mpegurl", false, info));
       });
 }