Ensure using chrome://thumb2/... adds the URL as a forced URL in TopSites so that a thumbnail is ca…

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"
@@ skipping 131 matching lines @@
   // Returns true if the top sites list of forced URLs is full (i.e. we already
   // have the maximum number of forced top sites).  This function also returns
   // false if TopSites isn't loaded yet.
   virtual bool IsForcedFull() = 0;
 
   virtual bool loaded() const = 0;
 
   // Returns the set of prepopulate pages.
   virtual MostVisitedURLList GetPrepopulatePages() = 0;
 
+  // Adds or updates a |url| for which we should force the capture of a
+  // thumbnail next time it's visited. If there is already a non-forced URL
+  // matching this |url| this call has no effect. Indicate this URL was laste
+  // forced at |time| so we can evict the older URLs when needed. Should be
+  // called from the UI thread.
+  virtual bool AddForcedURL(const GURL& url, const base::Time& time) = 0;
+
   struct PrepopulatedPage {
     // The string resource for the url.
     int url_id;
     // The string resource for the page title.
     int title_id;
     // The raw data resource for the favicon.
     int favicon_id;
     // The raw data resource for the thumbnail.
     int thumbnail_id;
     // The best color to highlight the page (should roughly match favicon).
     SkColor color;
   };
  protected:
   virtual ~TopSites() {}
 
  private:
   friend class base::RefCountedThreadSafe<TopSites>;
 };
 
 #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_