Sizes going across an IPC should be uint32.

BUG=164946

Review URL: https://chromiumcodereview.appspot.com/11472038

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@171944 0039d316-1c4b-4281-b951-d872f2087c98
void GpuCommandBufferStub::OnDestroyVideoDecoder(int decoder_route_id) {
  TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnDestroyVideoDecoder");
  channel_->RemoveRoute(decoder_route_id);
  video_decoders_.Remove(decoder_route_id);
}

void GpuCommandBufferStub::OnDestroyVideoDecoder(int decoder_route_id) {
  TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnDestroyVideoDecoder");
  channel_->RemoveRoute(decoder_route_id);
  video_decoders_.Remove(decoder_route_id);
}
