Handle crashing Pepper plug-ins the same as crashing NPAPI plug-ins.

BUG=151895

Review URL: https://chromiumcodereview.appspot.com/10956065

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@158364 0039d316-1c4b-4281-b951-d872f2087c98
void PpapiPluginProcessHost::OpenChannelToPlugin(Client* client) {
  if (process_->GetHost()->IsChannelOpening()) {
    pending_requests_.push_back(client);
    return;
  }

  RequestPluginChannel(client);
}

void PpapiPluginProcessHost::OpenChannelToPlugin(Client* client) {
  if (process_->GetHost()->IsChannelOpening()) {
    pending_requests_.push_back(client);
    return;
  }

  RequestPluginChannel(client);
}
