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

chrome/browser/thumbnails/thumbnail_service.h

Index: chrome/browser/thumbnails/thumbnail_service.h
diff --git a/chrome/browser/thumbnails/thumbnail_service.h b/chrome/browser/thumbnails/thumbnail_service.h
index ac21881774ae7a337a125beefea6c6539ba98b81..207ae57d9b0b60dc1eb83f07af60182112272b98 100644
--- a/chrome/browser/thumbnails/thumbnail_service.h
+++ b/chrome/browser/thumbnails/thumbnail_service.h
@@ -50,6 +50,10 @@ class ThumbnailService : public RefcountedBrowserContextKeyedService {
       bool prefix_match,
       scoped_refptr<base::RefCountedMemory>* bytes) = 0;
 
+  // Add or updates a |url| for which we should force the capture of a thumbnail
+  // next time it's visited.
+  virtual void AddForcedURL(const GURL& url) = 0;
+
   // Returns true if the page thumbnail should be updated.
   virtual bool ShouldAcquirePageThumbnail(const GURL& url) = 0;