Make CanPlayType("vp9.2") return true

media/base/mime_util_internal.cc

Index: media/base/mime_util_internal.cc
diff --git a/media/base/mime_util_internal.cc b/media/base/mime_util_internal.cc
index 11a763e74ab3c0054e6a39db8a3bcdbac462b19b..2416478b8fb489f0b3c41305215f1c54d98bfe01 100644
--- a/media/base/mime_util_internal.cc
+++ b/media/base/mime_util_internal.cc
@@ -718,6 +718,14 @@ bool MimeUtil::StringToCodec(const std::string& mime_type_lower_case,
         // Profile 0 should always be supported if VP9 is supported.
         *is_ambiguous = false;
         break;
+#if defined(ARCH_CPU_X86_FAMILY) && !defined(OS_ANDROID)

[ddorwin, 2016/10/04 00:43:13]

Will we not fall back to libvpx on Android if the platform decoder does not
support profile 2?

[ddorwin, 2016/10/04 00:43:13]

You might mention that this is because libvpx supports it in the comment below.

+      // Profile 1 & 2 are always supported on X86, at least for

[ddorwin, 2016/10/04 00:43:13]

Please update the browser tests.

+      // unencrypted videos.
+      case VP9PROFILE_PROFILE1:

[ddorwin, 2016/10/04 00:43:13]

The description does not cover this.

+      case VP9PROFILE_PROFILE2:
+        if (is_encrypted)
+          *is_ambiguous = true;
+#endif

[ddorwin, 2016/10/04 00:43:13]

break;

       default:
         // We don't know if the underlying platform supports these profiles.
         // Need to add platform level querying to get supported profiles