Adding YUVA support for enabling Alpha Playback

cc/output/gl_renderer.h

Index: cc/output/gl_renderer.h
diff --git a/cc/output/gl_renderer.h b/cc/output/gl_renderer.h
index 1c30d344f4607cfc5d1d3ef8f940f91c5c504700..a9ebe83fb118c67f7cac181243acde5e117d8a77 100644
--- a/cc/output/gl_renderer.h
+++ b/cc/output/gl_renderer.h
@@ -289,6 +289,8 @@ class CC_EXPORT GLRenderer
       VideoStreamTextureProgram;
   typedef ProgramBinding<VertexShaderPosTexYUVStretch, FragmentShaderYUVVideo>
       VideoYUVProgram;
+  typedef ProgramBinding<VertexShaderPosTexYUVStretch, FragmentShaderYUVAVideo>
+      VideoYUVAProgram;
 
   // Special purpose / effects shaders.
   typedef ProgramBinding<VertexShaderPos, FragmentShaderColor>
@@ -334,6 +336,8 @@ class CC_EXPORT GLRenderer
 
   const VideoYUVProgram* GetVideoYUVProgram(
       TexCoordPrecision precision);
+  const VideoYUVAProgram* GetVideoYUVAProgram(
+      TexCoordPrecision precision);
   const VideoStreamTextureProgram* GetVideoStreamTextureProgram(
       TexCoordPrecision precision);
 
@@ -390,9 +394,11 @@ class CC_EXPORT GLRenderer
       render_pass_mask_color_matrix_program_aa_highp_;
 
   scoped_ptr<VideoYUVProgram> video_yuv_program_;
+  scoped_ptr<VideoYUVAProgram> video_yuva_program_;
   scoped_ptr<VideoStreamTextureProgram> video_stream_texture_program_;
 
   scoped_ptr<VideoYUVProgram> video_yuv_program_highp_;
+  scoped_ptr<VideoYUVAProgram> video_yuva_program_highp_;
   scoped_ptr<VideoStreamTextureProgram> video_stream_texture_program_highp_;
 
   scoped_ptr<DebugBorderProgram> debug_border_program_;