Add LargeIconCache and LargeIconServiceFactory for iOS.

ios/chrome/browser/favicon/large_icon_cache_factory.mm

Index: ios/chrome/browser/favicon/large_icon_cache_factory.mm
diff --git a/ios/chrome/browser/favicon/large_icon_cache_factory.mm b/ios/chrome/browser/favicon/large_icon_cache_factory.mm
new file mode 100644
index 0000000000000000000000000000000000000000..e6112f72dc7bca61558c4db555f491678c99f8d4
--- /dev/null
+++ b/ios/chrome/browser/favicon/large_icon_cache_factory.mm
@@ -0,0 +1,42 @@
+// 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 "ios/chrome/browser/favicon/large_icon_cache_factory.h"
+
+#include "base/memory/singleton.h"
+#include "components/keyed_service/ios/browser_state_dependency_manager.h"
+#include "ios/chrome/browser/browser_state/browser_state_otr_helper.h"
+#include "ios/chrome/browser/favicon/large_icon_cache.h"
+#include "ios/public/provider/chrome/browser/browser_state/chrome_browser_state.h"
+
+// static
+LargeIconCache* LargeIconCacheFactory::GetForBrowserState(
+    ios::ChromeBrowserState* browser_state) {
+  return static_cast<LargeIconCache*>(
+      GetInstance()->GetServiceForBrowserState(browser_state, true));
+}
+
+// static
+LargeIconCacheFactory* LargeIconCacheFactory::GetInstance() {
+  return base::Singleton<LargeIconCacheFactory>::get();
+}
+
+LargeIconCacheFactory::LargeIconCacheFactory()
+    : BrowserStateKeyedServiceFactory(
+          "LargeIconCache",
+          BrowserStateDependencyManager::GetInstance()) {}
+
+LargeIconCacheFactory::~LargeIconCacheFactory() {}
+
+scoped_ptr<KeyedService> LargeIconCacheFactory::BuildServiceInstanceFor(
+    web::BrowserState* context) const {
+  ios::ChromeBrowserState* browser_state =
+      ios::ChromeBrowserState::FromBrowserState(context);
+  return make_scoped_ptr(new LargeIconCache(browser_state));
+}
+
+web::BrowserState* LargeIconCacheFactory::GetBrowserStateToUse(
+    web::BrowserState* context) const {
+  return GetBrowserStateOwnInstanceInIncognito(context);
+}