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
GpuVideoDecodeAccelerator::~GpuVideoDecodeAccelerator() {
  if (stub_)
    stub_->RemoveDestructionObserver(this);
  if (video_decode_accelerator_.get())
    video_decode_accelerator_.release()->Destroy();
}

GpuVideoDecodeAccelerator::~GpuVideoDecodeAccelerator() {
  if (stub_)
    stub_->RemoveDestructionObserver(this);
  if (video_decode_accelerator_.get())
    video_decode_accelerator_.release()->Destroy();
}
