[Fallback Icons] Refactor FallbackIconService to be a BrowserContext-level singleton

chrome/browser/favicon/chrome_fallback_icon_client_factory.cc

 // Copyright 2015 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/ui/bookmarks/enhanced_bookmark_key_service_factory.h"
+#include "chrome/browser/favicon/chrome_fallback_icon_client_factory.h"
 
 #include "base/memory/singleton.h"
+#include "chrome/browser/favicon/chrome_fallback_icon_client.h"
 #include "chrome/browser/profiles/incognito_helpers.h"
-#include "chrome/browser/ui/bookmarks/enhanced_bookmark_key_service.h"
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
+#include "content/public/browser/browser_context.h"
 
-// static
-EnhancedBookmarkKeyServiceFactory*
-    EnhancedBookmarkKeyServiceFactory::GetInstance() {
-  return Singleton<EnhancedBookmarkKeyServiceFactory>::get();
-}
-
-EnhancedBookmarkKeyServiceFactory::EnhancedBookmarkKeyServiceFactory()
+ChromeFallbackIconClientFactory::ChromeFallbackIconClientFactory()
     : BrowserContextKeyedServiceFactory(
-        "EnhancedBookmarkKeyService",
+        "ChromeFallbackIconClient",
         BrowserContextDependencyManager::GetInstance()) {
 }
 
-EnhancedBookmarkKeyServiceFactory::~EnhancedBookmarkKeyServiceFactory() {
+ChromeFallbackIconClientFactory::~ChromeFallbackIconClientFactory() {
 }
 
-KeyedService* EnhancedBookmarkKeyServiceFactory::BuildServiceInstanceFor(
-    content::BrowserContext* context) const {
-  return new EnhancedBookmarkKeyService(context);
+// static
+FallbackIconClient* ChromeFallbackIconClientFactory::GetForBrowserContext(
+    content::BrowserContext* context) {
+  return static_cast<FallbackIconClient*>(
+      GetInstance()->GetServiceForBrowserContext(context, true));
+}
+
+// static
+ChromeFallbackIconClientFactory*
+ChromeFallbackIconClientFactory::GetInstance() {
+  return Singleton<ChromeFallbackIconClientFactory>::get();
+}
+
+KeyedService* ChromeFallbackIconClientFactory::BuildServiceInstanceFor(
+    content::BrowserContext* /* context */) const {
+  return new ChromeFallbackIconClient();
 }
 
 content::BrowserContext*
-    EnhancedBookmarkKeyServiceFactory::GetBrowserContextToUse(
-        content::BrowserContext* context) const {
+ChromeFallbackIconClientFactory::GetBrowserContextToUse(
+    content::BrowserContext* context) const {
   return chrome::GetBrowserContextRedirectedInIncognito(context);

[pkotwicz, 2015/03/27 18:52:31]

Nit: Remove this method. The factories for FallbackIconServiceFactory should be
very similar.

I know that it "doesn't really matter" because the BrowserContext is not used by
either FallbackIconService or ChromeFallbackIconClient

[huangs, 2015/03/27 19:01:51]

Done.

 }
-
-bool EnhancedBookmarkKeyServiceFactory::ServiceIsCreatedWithBrowserContext()
-    const {
-  return true;
-}
-
-bool EnhancedBookmarkKeyServiceFactory::ServiceIsNULLWhileTesting() const {
-  return true;
-}