Plumb decoded video pixel format from GPU process to renderer.

media/gpu/fake_video_decode_accelerator.cc

Index: media/gpu/fake_video_decode_accelerator.cc
diff --git a/media/gpu/fake_video_decode_accelerator.cc b/media/gpu/fake_video_decode_accelerator.cc
index 414acabe6083ffd734fb7739d9b44dc176cc5096..7b13cb2102d22197c05cea34802b69db19ee419a 100644
--- a/media/gpu/fake_video_decode_accelerator.cc
+++ b/media/gpu/fake_video_decode_accelerator.cc
@@ -57,8 +57,8 @@ bool FakeVideoDecodeAccelerator::Initialize(const Config& config,
   // V4L2VideoDecodeAccelerator waits until first decode call to ask for buffers
   // This class asks for it on initialization instead.
   client_ = client;
-  client_->ProvidePictureBuffers(kNumBuffers, 1, frame_buffer_size_,
-                                 kDefaultTextureTarget);
+  client_->ProvidePictureBuffers(kNumBuffers, PIXEL_FORMAT_UNKNOWN, 1,
+                                 frame_buffer_size_, kDefaultTextureTarget);
   return true;
 }