Revert of Plumb decoded video pixel format from GPU process to renderer.

media/gpu/ipc/service/gpu_video_decode_accelerator.cc

Index: media/gpu/ipc/service/gpu_video_decode_accelerator.cc
diff --git a/media/gpu/ipc/service/gpu_video_decode_accelerator.cc b/media/gpu/ipc/service/gpu_video_decode_accelerator.cc
index 746914633e98d98f860e6dce3531e3462fea9d99..44f8a12a6fb6605adfe376b2bdf6c357cde758a6 100644
--- a/media/gpu/ipc/service/gpu_video_decode_accelerator.cc
+++ b/media/gpu/ipc/service/gpu_video_decode_accelerator.cc
@@ -218,7 +218,6 @@
 
 void GpuVideoDecodeAccelerator::ProvidePictureBuffers(
     uint32_t requested_num_of_buffers,
-    VideoPixelFormat format,
     uint32_t textures_per_buffer,
     const gfx::Size& dimensions,
     uint32_t texture_target) {
@@ -229,7 +228,7 @@
     return;
   }
   if (!Send(new AcceleratedVideoDecoderHostMsg_ProvidePictureBuffers(
-          host_route_id_, requested_num_of_buffers, format, textures_per_buffer,
+          host_route_id_, requested_num_of_buffers, textures_per_buffer,
           dimensions, texture_target))) {
     DLOG(ERROR) << "Send(AcceleratedVideoDecoderHostMsg_ProvidePictureBuffers) "
                 << "failed";