Topsites become keyedService based.

chrome/browser/history/top_sites.h

 // 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.
 
 #ifndef CHROME_BROWSER_HISTORY_TOP_SITES_H_
 #define CHROME_BROWSER_HISTORY_TOP_SITES_H_
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/gtest_prod_util.h"
-#include "base/memory/ref_counted.h"
 #include "chrome/browser/history/history_service.h"
 #include "components/history/core/browser/history_types.h"
 #include "components/history/core/browser/top_sites_observer.h"
 #include "components/history/core/common/thumbnail_score.h"
+#include "components/keyed_service/core/refcounted_keyed_service.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/gfx/image/image.h"
 
 class GURL;
 class Profile;
 
 namespace base {
 class FilePath;
 class RefCountedBytes;
 class RefCountedMemory;
 }
 
 namespace history {
 
 class TopSitesCache;
 
 // Interface for TopSites, which stores the data for the top "most visited"
 // sites. This includes a cache of the most visited data from history, as well
 // as the corresponding thumbnails of those sites.
 //
 // Some methods should only be called from the UI thread (see method
 // descriptions below). All others are assumed to be threadsafe.
-class TopSites
-    : public base::RefCountedThreadSafe<TopSites>,
-      public content::NotificationObserver {
+class TopSites : public RefcountedKeyedService,
+                 public content::NotificationObserver {
  public:
   TopSites();
 
   // Initializes TopSites.
   static TopSites* Create(Profile* profile, const base::FilePath& db_name);
 
   // Sets the given thumbnail for the given URL. Returns true if the thumbnail
   // was updated. False means either the URL wasn't known to us, or we felt
   // that our current thumbnail was superior to the given one. Should be called
   // from the UI thread.
   virtual bool SetPageThumbnail(const GURL& url,
                                 const gfx::Image& thumbnail,
                                 const ThumbnailScore& score) = 0;
 
   // While testing the history system, we want to set the thumbnail to a piece
   // of static memory.
-  virtual bool SetPageThumbnailToJPEGBytes(
-      const GURL& url,
-      const base::RefCountedMemory* memory,
-      const ThumbnailScore& score) = 0;
+  virtual bool SetPageThumbnailToJPEGBytes(const GURL& url,
+                                           const base::RefCountedMemory* memory,
+                                           const ThumbnailScore& score) = 0;
 
   typedef base::Callback<void(const MostVisitedURLList&)>
       GetMostVisitedURLsCallback;
 
   // Returns a list of most visited URLs via a callback, if
   // |include_forced_urls| is false includes only non-forced URLs. This may be
   // invoked on any thread. NOTE: the callback is called immediately if we have
   // the data cached. If data is not available yet, callback will later be
   // posted to the thread called this function.
-  virtual void GetMostVisitedURLs(
-      const GetMostVisitedURLsCallback& callback,
-      bool include_forced_urls) = 0;
+  virtual void GetMostVisitedURLs(const GetMostVisitedURLsCallback& callback,
+                                  bool include_forced_urls) = 0;
 
   // Gets a thumbnail for a given page. Returns true iff we have the thumbnail.
   // This may be invoked on any thread.
   // If an exact thumbnail URL match fails, |prefix_match| specifies whether or
   // not to try harder by matching the query thumbnail URL as URL prefix (as
   // defined by UrlIsPrefix()).
   // As this method may be invoked on any thread the ref count needs to be
   // incremented before this method returns, so this takes a scoped_refptr*.
   virtual bool GetPageThumbnail(
       const GURL& url,
@@ skipping 106 matching lines @@
 const int kPrepopulatedPagesCount = 0;
 #else
 const int kPrepopulatedPagesCount = 2;
 #endif
 extern const TopSites::PrepopulatedPage
     kPrepopulatedPages[kPrepopulatedPagesCount];
 
 }  // namespace history
 
 #endif  // CHROME_BROWSER_HISTORY_TOP_SITES_H_