Add a feature flag for enabling subscription restrictions

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 317 matching lines @@
     const gcm::GCMClient::SendErrorDetails& send_error_details) {
   NOTREACHED() << "The Push API shouldn't have sent messages upstream";
 }
 
 void PushMessagingServiceImpl::OnSendAcknowledged(
     const std::string& app_id,
     const std::string& message_id) {
   NOTREACHED() << "The Push API shouldn't have sent messages upstream";
 }
 
-// GetPushEndpoint method ------------------------------------------------------
+// GetEndpoint method ----------------------------------------------------------
 
-GURL PushMessagingServiceImpl::GetPushEndpoint() {
-  return GURL(std::string(kPushMessagingEndpoint));
+GURL PushMessagingServiceImpl::GetEndpoint(bool standard_protocol) const {
+  return GURL(standard_protocol ? kPushMessagingPushProtocolEndpoint
+                                : kPushMessagingEndpoint);
 }
 
 // Subscribe and GetPermissionStatus methods -----------------------------------
 
 void PushMessagingServiceImpl::SubscribeFromDocument(
     const GURL& requesting_origin,
     int64_t service_worker_registration_id,
     int renderer_id,
     int render_frame_id,
     const content::PushSubscriptionOptions& options,
@@ skipping 422 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();
 }