Add support for color formats negotiation.

media/base/android/media_codec_bridge.h

Index: media/base/android/media_codec_bridge.h
diff --git a/media/base/android/media_codec_bridge.h b/media/base/android/media_codec_bridge.h
index da2348f497556b9b86cc715dc038552721c6de7d..44fd146e80ab1fd67b95cc16b38467f072fd07a1 100644
--- a/media/base/android/media_codec_bridge.h
+++ b/media/base/android/media_codec_bridge.h
@@ -81,6 +81,9 @@ class MEDIA_EXPORT MediaCodecBridge {
   static std::string GetDefaultCodecName(const std::string& mime_type,
                                          MediaCodecDirection direction);
 
+  // Get a list of encoder supported color formats for specified mime type.

[xhwang, 2014/10/13 17:37:35]

nit: |mime_type|

Can you add comments about how an "int" is mapped to a color format? For
example, refer to MediaCodecInfo.CodecCapabilities...

[changbin, 2014/10/15 02:17:10]

Done.

+  static std::vector<int> GetEncoderColorFormats(const std::string& mime_type);
+
   virtual ~MediaCodecBridge();
 
   // Resets both input and output, all indices previously returned in calls to