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

chrome/browser/ui/webui/ntp/thumbnail_source.cc

Index: chrome/browser/ui/webui/ntp/thumbnail_source.cc
diff --git a/chrome/browser/ui/webui/ntp/thumbnail_source.cc b/chrome/browser/ui/webui/ntp/thumbnail_source.cc
index a14239f57937830d2d94e0f65a5baf0d554bdeed..29ffde0d45533445d877d3b149d518aea7ed8aba 100644
--- a/chrome/browser/ui/webui/ntp/thumbnail_source.cc
+++ b/chrome/browser/ui/webui/ntp/thumbnail_source.cc
@@ -20,17 +20,17 @@
 using content::BrowserThread;
 
 // Set ThumbnailService now as Profile isn't thread safe.
-ThumbnailSource::ThumbnailSource(Profile* profile, bool prefix_match)
+ThumbnailSource::ThumbnailSource(Profile* profile, bool forced_thumbnails)
     : thumbnail_service_(ThumbnailServiceFactory::GetForProfile(profile)),
       profile_(profile),
-      prefix_match_(prefix_match) {
+      forced_thumbnails_(forced_thumbnails) {
 }
 
 ThumbnailSource::~ThumbnailSource() {
 }
 
 std::string ThumbnailSource::GetSource() const {
-  return prefix_match_ ?
+  return forced_thumbnails_ ?
       chrome::kChromeUIThumbnailHost2 : chrome::kChromeUIThumbnailHost;
 }
 
@@ -40,12 +40,15 @@ void ThumbnailSource::StartDataRequest(
     int render_view_id,
     const content::URLDataSource::GotDataCallback& callback) {
   scoped_refptr<base::RefCountedMemory> data;
-  if (thumbnail_service_->GetPageThumbnail(GURL(path), prefix_match_, &data)) {
+  if (thumbnail_service_->GetPageThumbnail(GURL(path), forced_thumbnails_,
+                                           &data)) {
     // We have the thumbnail.
     callback.Run(data.get());
   } else {
     callback.Run(default_thumbnail_.get());
   }
+  if (forced_thumbnails_)
+    thumbnail_service_->AddForcedURL(GURL(path));
 }
 
 std::string ThumbnailSource::GetMimeType(const std::string&) const {