Make sure canPlayType does not return probably/maybe for VP9 on Android.

net/base/mime_util.cc

Index: net/base/mime_util.cc
diff --git a/net/base/mime_util.cc b/net/base/mime_util.cc
index ddb9b66ee835d69b16427092e3a8ad1ccff6045c..d0ab79c05e47f4cd00ab17d48ca45fa5da973d8f 100644
--- a/net/base/mime_util.cc
+++ b/net/base/mime_util.cc
@@ -304,10 +304,11 @@ static const char* const proprietary_media_types[] = {
 static const char* const common_media_codecs[] = {
 #if !defined(OS_ANDROID)  // Android doesn't support Ogg Theora.
   "theora",
+  "vp9",  // TODO(tomfinegan): Move vp9 back down with vp8 once VP9 is supported
+          // on Android. https://crbug.com/285016
 #endif
   "vorbis",
   "vp8",
-  "vp9",
   "1"  // WAVE_FORMAT_PCM.
 };
 
@@ -413,7 +414,13 @@ struct MediaFormatStrict {
 };
 
 static const MediaFormatStrict format_codec_mappings[] = {
+  // TODO(tomfinegan): Remove this if/else when VP9 is supported on Android.
+  // https://crbug.com/285016
+#if !defined(OS_ANDROID)
   { "video/webm", "vorbis,vp8,vp8.0,vp9,vp9.0" },
+#else
+  { "video/webm", "vorbis,vp8,vp8.0" },
+#endif
   { "audio/webm", "vorbis" },
   { "audio/wav", "1" }
 };