Reintroduce plumbing for user gesture into permission system.

chrome/browser/push_messaging/push_messaging_service_impl.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/push_messaging/push_messaging_service_impl.h"
 
 #include <vector>
 
 #include "base/barrier_closure.h"
 #include "base/base64url.h"
@@ skipping 380 matching lines @@
         content::CONSOLE_MESSAGE_LEVEL_ERROR, kSilentPushUnsupportedMessage);
 
     SubscribeEndWithError(callback,
                           content::PUSH_REGISTRATION_STATUS_PERMISSION_DENIED);
     return;
   }
 
   // Push does not allow permission requests from iframes.
   profile_->GetPermissionManager()->RequestPermission(
       content::PermissionType::PUSH_MESSAGING, web_contents->GetMainFrame(),
-      requesting_origin,
+      requesting_origin, true /* user_gesture */,
       base::Bind(&PushMessagingServiceImpl::DidRequestPermission,
                  weak_factory_.GetWeakPtr(), app_identifier, options,
                  callback));
 }
 
 void PushMessagingServiceImpl::SubscribeFromWorker(
     const GURL& requesting_origin,
     int64_t service_worker_registration_id,
     const content::PushSubscriptionOptions& options,
     const content::PushMessagingService::RegisterCallback& register_callback) {
@@ skipping 380 matching lines @@
          blink::WebPushPermissionStatusGranted;
 }
 
 gcm::GCMDriver* PushMessagingServiceImpl::GetGCMDriver() const {
   gcm::GCMProfileService* gcm_profile_service =
       gcm::GCMProfileServiceFactory::GetForProfile(profile_);
   CHECK(gcm_profile_service);
   CHECK(gcm_profile_service->driver());
   return gcm_profile_service->driver();
 }