Add a class to replace ImageLoadingTracker with a nicer API.

chrome/browser/extensions/extension_system.cc

 // Copyright (c) 2012 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/extension_system.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/file_path.h"
 #include "base/string_tokenizer.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/content_settings/cookie_settings.h"
 #include "chrome/browser/extensions/api/alarms/alarm_manager.h"
 #include "chrome/browser/extensions/api/declarative/rules_registry_service.h"
 #include "chrome/browser/extensions/api/messaging/message_service.h"
 #include "chrome/browser/extensions/component_loader.h"
 #include "chrome/browser/extensions/event_router.h"
 #include "chrome/browser/extensions/extension_devtools_manager.h"
 #include "chrome/browser/extensions/extension_error_reporter.h"
 #include "chrome/browser/extensions/extension_info_map.h"
 #include "chrome/browser/extensions/extension_pref_store.h"
 #include "chrome/browser/extensions/extension_pref_value_map.h"
 #include "chrome/browser/extensions/extension_pref_value_map_factory.h"
 #include "chrome/browser/extensions/extension_process_manager.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_system_factory.h"
+#include "chrome/browser/extensions/image_loader.h"
 #include "chrome/browser/extensions/lazy_background_task_queue.h"
 #include "chrome/browser/extensions/management_policy.h"
 #include "chrome/browser/extensions/navigation_observer.h"
 #include "chrome/browser/extensions/shell_window_geometry_cache.h"
 #include "chrome/browser/extensions/state_store.h"
 #include "chrome/browser/extensions/unpacked_installer.h"
 #include "chrome/browser/extensions/user_script_master.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_manager.h"
@@ skipping 196 matching lines @@
 }
 
 MessageService* ExtensionSystemImpl::Shared::message_service() {
   return message_service_.get();
 }
 
 EventRouter* ExtensionSystemImpl::Shared::event_router() {
   return extension_event_router_.get();
 }
 
+ImageLoader* ExtensionSystemImpl::Shared::image_loader() {
+  if (!image_loader_)
+    image_loader_.reset(new ImageLoader());
+  return image_loader_.get();
+}
+
 //
 // ExtensionSystemImpl
 //
 
 ExtensionSystemImpl::ExtensionSystemImpl(Profile* profile)
     : profile_(profile),
       extension_devtools_manager_(NULL) {
   shared_ = ExtensionSystemSharedFactory::GetForProfile(profile);
 
   if (profile->IsOffTheRecord()) {
@@ skipping 100 matching lines @@
 }
 
 EventRouter* ExtensionSystemImpl::event_router() {
   return shared_->event_router();
 }
 
 RulesRegistryService* ExtensionSystemImpl::rules_registry_service() {
   return rules_registry_service_.get();
 }
 
+ImageLoader* ExtensionSystemImpl::image_loader() {
+  return shared_->image_loader();
+}
+
 ApiResourceManager<SerialConnection>*
 ExtensionSystemImpl::serial_connection_manager() {
   return serial_connection_manager_.get();
 }
 
 ApiResourceManager<Socket>* ExtensionSystemImpl::socket_manager() {
   return socket_manager_.get();
 }
 
 ApiResourceManager<UsbDeviceResource>*
@@ skipping 20 matching lines @@
 void ExtensionSystemImpl::UnregisterExtensionWithRequestContexts(
     const std::string& extension_id,
     const extension_misc::UnloadedExtensionReason reason) {
   BrowserThread::PostTask(
       BrowserThread::IO, FROM_HERE,
       base::Bind(&ExtensionInfoMap::RemoveExtension, info_map(),
                  extension_id, reason));
 }
 
 }  // namespace extensions