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 WebPluginDelegateProxy::ImeCompositionCompleted(const string16& text,
                                                     int plugin_id) {
  if (instance_id_ != plugin_id)
    return;

  IPC::Message* msg = new PluginMsg_ImeCompositionCompleted(instance_id_, text);
  msg->set_unblock(true);
  Send(msg);
}

void WebPluginDelegateProxy::ImeCompositionCompleted(const string16& text,
                                                     int plugin_id) {
  if (instance_id_ != plugin_id)
    return;

  IPC::Message* msg = new PluginMsg_ImeCompositionCompleted(instance_id_, text);
  msg->set_unblock(true);
  Send(msg);
}
