Introduce ChromeBookmarkClientFactory

components/bookmarks/browser/bookmark_client.h

 // Copyright 2014 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.
 
 #ifndef COMPONENTS_BOOKMARKS_BROWSER_BOOKMARK_CLIENT_H_
 #define COMPONENTS_BOOKMARKS_BROWSER_BOOKMARK_CLIENT_H_
 
 #include <set>
 #include <utility>
 #include <vector>
 
 #include "base/callback_forward.h"
 #include "base/task/cancelable_task_tracker.h"
 #include "components/favicon_base/favicon_callback.h"
+#include "components/keyed_service/core/keyed_service.h"
 
 class BookmarkNode;
 class GURL;
 
 namespace base {
 struct UserMetricsAction;
 }
 
 // This class abstracts operations that depends on the embedder's environment,
 // e.g. Chrome.
-class BookmarkClient {
+class BookmarkClient : public KeyedService {
  public:
   // Types representing a set of BookmarkNode and a mapping from BookmarkNode
   // to the number of time the corresponding URL has been typed by the user in
   // the Omnibox.
   typedef std::set<const BookmarkNode*> NodeSet;
   typedef std::pair<const BookmarkNode*, int> NodeTypedCountPair;
   typedef std::vector<NodeTypedCountPair> NodeTypedCountPairs;
 
   // Returns true if the embedder favors touch icons over favicons.
   virtual bool PreferTouchIcon();
@@ skipping 25 matching lines @@
 
   // Wrapper around RecordAction defined in base/metrics/user_metrics.h
   // that ensure that the action is posted from the correct thread.
   virtual void RecordAction(const base::UserMetricsAction& action) = 0;
 
  protected:
   virtual ~BookmarkClient() {}
 };
 
 #endif  // COMPONENTS_BOOKMARKS_BROWSER_BOOKMARK_CLIENT_H_