cleanup: Use EventRouter instead of ExtensionSystem::Get->event_router()

chrome/browser/extensions/api/gcm/gcm_api.cc

 // Copyright 2013 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/extensions/api/gcm/gcm_api.h"
 
 #include <algorithm>
 #include <map>
 #include <vector>
 
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/services/gcm/gcm_profile_service.h"
 #include "chrome/browser/services/gcm/gcm_profile_service_factory.h"
 #include "chrome/common/extensions/api/gcm.h"
-#include "extensions/browser/extension_system.h"
 #include "extensions/common/extension.h"
 
 namespace {
 
 const size_t kMaximumMessageSize = 4096;  // in bytes.
 const char kCollapseKey[] = "collapse_key";
 const char kGoogDotRestrictedPrefix[] = "goog.";
 const char kGoogleRestrictedPrefix[] = "google";
 
 // Error messages.
@@ skipping 161 matching lines @@
         kMaximumMessageSize < iter->first.size() ||
         kMaximumMessageSize < iter->second.size() ||
         kMaximumMessageSize < total_size)
       return false;
   }
 
   return total_size != 0;
 }
 
 GcmJsEventRouter::GcmJsEventRouter(Profile* profile) : profile_(profile) {
-  if (ExtensionSystem::Get(profile_)->event_router()) {
-    ExtensionSystem::Get(profile_)->event_router()->RegisterObserver(
-        this, api::gcm::OnMessage::kEventName);
-    ExtensionSystem::Get(profile_)->event_router()->RegisterObserver(
-        this, api::gcm::OnMessagesDeleted::kEventName);
-    ExtensionSystem::Get(profile_)->event_router()->RegisterObserver(
-        this, api::gcm::OnSendError::kEventName);
-  }
+  EventRouter* event_router = EventRouter::Get(profile_);
+  if (!event_router)
+    return;
+
+  event_router->RegisterObserver(this, api::gcm::OnMessage::kEventName);
+  event_router->RegisterObserver(this, api::gcm::OnMessagesDeleted::kEventName);
+  event_router->RegisterObserver(this, api::gcm::OnSendError::kEventName);
 }
 
 GcmJsEventRouter::~GcmJsEventRouter() {
-  if (ExtensionSystem::Get(profile_)->event_router())
-    ExtensionSystem::Get(profile_)->event_router()->UnregisterObserver(this);
+  EventRouter* event_router = EventRouter::Get(profile_);
+  if (event_router)
+    event_router->UnregisterObserver(this);
 }
 
 void GcmJsEventRouter::OnMessage(
     const std::string& app_id,
     const gcm::GCMClient::IncomingMessage& message) {
   api::gcm::OnMessage::Message message_arg;
   message_arg.data.additional_properties = message.data;
   if (!message.collapse_key.empty())
     message_arg.collapse_key.reset(new std::string(message.collapse_key));
 
   scoped_ptr<Event> event(new Event(
       api::gcm::OnMessage::kEventName,
       api::gcm::OnMessage::Create(message_arg).Pass(),
       profile_));
-  ExtensionSystem::Get(profile_)->event_router()->DispatchEventToExtension(
-      app_id, event.Pass());
+  EventRouter::Get(profile_)->DispatchEventToExtension(app_id, event.Pass());
 }
 
 void GcmJsEventRouter::OnMessagesDeleted(const std::string& app_id) {
   scoped_ptr<Event> event(new Event(
       api::gcm::OnMessagesDeleted::kEventName,
       api::gcm::OnMessagesDeleted::Create().Pass(),
       profile_));
-  ExtensionSystem::Get(profile_)->event_router()->DispatchEventToExtension(
-      app_id, event.Pass());
+  EventRouter::Get(profile_)->DispatchEventToExtension(app_id, event.Pass());
 }
 
 void GcmJsEventRouter::OnSendError(
     const std::string& app_id,
     const gcm::GCMClient::SendErrorDetails& send_error_details) {
   api::gcm::OnSendError::Error error;
   error.message_id.reset(new std::string(send_error_details.message_id));
   error.error_message = GcmResultToError(send_error_details.result);
   error.details.additional_properties = send_error_details.additional_data;
 
   scoped_ptr<Event> event(new Event(
       api::gcm::OnSendError::kEventName,
       api::gcm::OnSendError::Create(error).Pass(),
       profile_));
-  ExtensionSystem::Get(profile_)->event_router()->DispatchEventToExtension(
-      app_id, event.Pass());
+  EventRouter::Get(profile_)->DispatchEventToExtension(app_id, event.Pass());
 }
 
 void GcmJsEventRouter::OnListenerAdded(const EventListenerInfo& details) {
   if (gcm::GCMProfileService::GetGCMEnabledState(profile_) ==
       gcm::GCMProfileService::ALWAYS_DISABLED) {
     return;
   }
   gcm::GCMProfileServiceFactory::GetForProfile(profile_)->Start();
 }
 
 }  // namespace extensions