Add LargeIconCache and LargeIconServiceFactory for iOS.

ios/chrome/browser/favicon/ios_chrome_large_icon_cache_factory.h

Index: ios/chrome/browser/favicon/ios_chrome_large_icon_cache_factory.h
diff --git a/ios/chrome/browser/dom_distiller/dom_distiller_service_factory.h b/ios/chrome/browser/favicon/ios_chrome_large_icon_cache_factory.h
similarity index 51%
copy from ios/chrome/browser/dom_distiller/dom_distiller_service_factory.h
copy to ios/chrome/browser/favicon/ios_chrome_large_icon_cache_factory.h
index 80e2294e44f52989fe027faaaff3c98d4f860dc4..6a20527c2af4a632fa4627beee623a196d961e24 100644
--- a/ios/chrome/browser/dom_distiller/dom_distiller_service_factory.h
+++ b/ios/chrome/browser/favicon/ios_chrome_large_icon_cache_factory.h
@@ -2,39 +2,39 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef IOS_CHROME_BROWSER_DOM_DISTILLER_DOM_DISTILLER_SERVICE_FACTORY_H_
-#define IOS_CHROME_BROWSER_DOM_DISTILLER_DOM_DISTILLER_SERVICE_FACTORY_H_
+#ifndef IOS_CHROME_BROWSER_FAVICON_IOS_CHROME_LARGE_ICON_CACHE_FACTORY_H_
+#define IOS_CHROME_BROWSER_FAVICON_IOS_CHROME_LARGE_ICON_CACHE_FACTORY_H_
 
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "components/keyed_service/ios/browser_state_keyed_service_factory.h"
 
+class KeyedService;
+class LargeIconCache;
+
 namespace base {
 template <typename T>
 struct DefaultSingletonTraits;
-}  // namespace base
-
-namespace dom_distiller {
-class DomDistillerService;
 }
 
 namespace ios {
 class ChromeBrowserState;
 }
 
-namespace dom_distiller {
-
-class DomDistillerServiceFactory : public BrowserStateKeyedServiceFactory {
+// Singleton that owns all LargeIconCaches and associates them with
+// ChromeBrowserState.
+class IOSChromeLargeIconCacheFactory : public BrowserStateKeyedServiceFactory {
  public:
-  static DomDistillerServiceFactory* GetInstance();
-  static DomDistillerService* GetForBrowserState(
+  static LargeIconCache* GetForBrowserState(
       ios::ChromeBrowserState* browser_state);
 
+  static IOSChromeLargeIconCacheFactory* GetInstance();
+
  private:
-  friend struct base::DefaultSingletonTraits<DomDistillerServiceFactory>;
+  friend struct base::DefaultSingletonTraits<IOSChromeLargeIconCacheFactory>;
 
-  DomDistillerServiceFactory();
-  ~DomDistillerServiceFactory() override;
+  IOSChromeLargeIconCacheFactory();
+  ~IOSChromeLargeIconCacheFactory() override;
 
   // BrowserStateKeyedServiceFactory implementation.
   scoped_ptr<KeyedService> BuildServiceInstanceFor(
@@ -42,9 +42,7 @@ class DomDistillerServiceFactory : public BrowserStateKeyedServiceFactory {
   web::BrowserState* GetBrowserStateToUse(
       web::BrowserState* context) const override;
 
-  DISALLOW_COPY(DomDistillerServiceFactory);
+  DISALLOW_COPY_AND_ASSIGN(IOSChromeLargeIconCacheFactory);
 };
 
-}  // namespace dom_distiller
-
-#endif  // IOS_CHROME_BROWSER_DOM_DISTILLER_DOM_DISTILLER_SERVICE_FACTORY_H_
+#endif  // IOS_CHROME_BROWSER_FAVICON_IOS_CHROME_LARGE_ICON_CACHE_FACTORY_H_