Plumb decoded video pixel format from GPU process to renderer.

media/video/video_decode_accelerator.cc

Index: media/video/video_decode_accelerator.cc
diff --git a/media/video/video_decode_accelerator.cc b/media/video/video_decode_accelerator.cc
index 382625a0cbf85a3ea52dd6ca8b411cf18b32dbbf..ba5b76728cb6cc00f9cfb7dfce844db50768c973 100644
--- a/media/video/video_decode_accelerator.cc
+++ b/media/video/video_decode_accelerator.cc
@@ -53,10 +53,6 @@ GLenum VideoDecodeAccelerator::GetSurfaceInternalFormat() const {
   return GL_RGBA;
 }
 
-VideoPixelFormat VideoDecodeAccelerator::GetOutputFormat() const {
-  return PIXEL_FORMAT_UNKNOWN;
-}
-
 VideoDecodeAccelerator::SupportedProfile::SupportedProfile()
     : profile(media::VIDEO_CODEC_PROFILE_UNKNOWN), encrypted_only(false) {}