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
BrowserGpuChannelHostFactory::BrowserGpuChannelHostFactory()
    : gpu_client_id_(ChildProcessHostImpl::GenerateChildProcessUniqueId()),
      shutdown_event_(new base::WaitableEvent(true, false)),
      gpu_host_id_(0) {
}

BrowserGpuChannelHostFactory::BrowserGpuChannelHostFactory()
    : gpu_client_id_(ChildProcessHostImpl::GenerateChildProcessUniqueId()),
      shutdown_event_(new base::WaitableEvent(true, false)),
      gpu_host_id_(0) {
}
