Implementing chrome://thumbnails page to view URLs in TopSites and cached thumbnails.

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/common/cancelable_request.h"
 #include "chrome/browser/history/history_service.h"
 #include "chrome/browser/history/history_types.h"
 #include "chrome/common/thumbnail_score.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/gfx/image/image.h"
-#include "url/gurl.h"
 
+class GURL;
 class Profile;
 
 namespace base {
 class FilePath;
 class RefCountedBytes;
 class RefCountedMemory;
 }
 
 namespace history {
 
@@ skipping 34 matching lines @@
   typedef std::vector<GetMostVisitedURLsCallback> PendingCallbacks;
 
   // Returns a list of most visited URLs via a callback. 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) = 0;
 
-  // Get a thumbnail for a given page. Returns true iff we have the thumbnail.
+  // 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,
       bool prefix_match,
       scoped_refptr<base::RefCountedMemory>* bytes) = 0;
@@ skipping 80 matching lines @@
 
 #if defined(OS_ANDROID)
 extern const TopSites::PrepopulatedPage kPrepopulatedPages[1];
 #else
 extern const TopSites::PrepopulatedPage kPrepopulatedPages[2];
 #endif
 
 }  // namespace history
 
 #endif  // CHROME_BROWSER_HISTORY_TOP_SITES_H_