Convert plugin and GPU process to brokered handle duplication.

BUG=119250
Review URL: https://chromiumcodereview.appspot.com/9958034

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@132303 0039d316-1c4b-4281-b951-d872f2087c98
void CommandBufferProxyImpl::OnUpdateState(
    const gpu::CommandBuffer::State& state) {
  if (state.generation - last_state_.generation < 0x80000000U)
    last_state_ = state;
}

void CommandBufferProxyImpl::OnUpdateState(
    const gpu::CommandBuffer::State& state) {
  if (state.generation - last_state_.generation < 0x80000000U)
    last_state_ = state;
}
