ThumbnailTabHelper: Capture thumbnail when page load finishes

chrome/browser/thumbnails/thumbnail_tab_helper.h

Index: chrome/browser/thumbnails/thumbnail_tab_helper.h
diff --git a/chrome/browser/thumbnails/thumbnail_tab_helper.h b/chrome/browser/thumbnails/thumbnail_tab_helper.h
index aae839e6d97253aec792adb41f28c930ce1d5084..b91b05ab115336cee6b24b0ac2744fd9874b0f84 100644
--- a/chrome/browser/thumbnails/thumbnail_tab_helper.h
+++ b/chrome/browser/thumbnails/thumbnail_tab_helper.h
@@ -38,6 +38,7 @@ class ThumbnailTabHelper
   // content::WebContentsObserver overrides.
   void RenderViewDeleted(content::RenderViewHost* render_view_host) override;
   void DidStartLoading() override;
+  void DidStopLoading() override;
   void NavigationStopped() override;
 
   // Update the thumbnail of the given tab contents if necessary.
@@ -67,6 +68,8 @@ class ThumbnailTabHelper
   // Indicates that the given widget has changed is visibility.
   void WidgetHidden(content::RenderWidgetHost* widget);
 
+  const bool capture_on_load_finished_;
+
   content::NotificationRegistrar registrar_;
   scoped_refptr<thumbnails::ThumbnailingContext> thumbnailing_context_;