A number of paint optimizations to improve overall paint times.

chrome/browser/ui/views/location_bar/location_bar_view.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_UI_VIEWS_LOCATION_BAR_LOCATION_BAR_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_LOCATION_BAR_LOCATION_BAR_VIEW_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 360 matching lines @@
 
   // Returns the thickness of any visible left and right edge, in pixels.
   int GetHorizontalEdgeThickness() const;
 
   // The same, but for the top and bottom edges.
   int vertical_edge_thickness() const {
     return is_popup_mode_ ? kPopupEdgeThickness : kNormalEdgeThickness;
   }
 
   // Updates the visibility state of the Content Blocked icons to reflect what
-  // is actually blocked on the current page.
-  void RefreshContentSettingViews();
+  // is actually blocked on the current page. Returns true if the visibility
+  // of at least one of the views in |content_setting_views_| changed.
+  bool RefreshContentSettingViews();
 
   // Deletes all page action views that we have created.
   void DeletePageActionViews();
 
   // Updates the views for the Page Actions, to reflect state changes for
-  // PageActions.
-  void RefreshPageActionViews();
+  // PageActions. Returns true if the visibility of a PageActionWithBadgeView
+  // changed, or PageActionWithBadgeView were created/destroyed.
+  bool RefreshPageActionViews();
 
   // Returns the number of scripts currently running on the page.
   size_t ScriptBubbleScriptsRunning();
 
   // Updates the Script Bubble Icon, to reflect the number of content scripts
-  // running on the page.
-  void RefreshScriptBubble();
+  // running on the page. Returns true if the visibility of the bubble changed.
+  bool RefreshScriptBubble();
 
-  // Updates the view for the zoom icon based on the current tab's zoom.
-  void RefreshZoomView();
+  // Updates the view for the zoom icon based on the current tab's zoom. Returns
+  // true if the visibility of the view changed.
+  bool RefreshZoomView();
 
   // Updates the Translate icon based on the current tab's Translate status.
   void RefreshTranslateIcon();
 
   // Sets the visibility of view to new_vis.
   void ToggleVisibility(bool new_vis, views::View* view);
 
-  void RefreshManagePasswordsIconView();
+  // Updates |manage_passwords_icon_view_|. Returns true if visibility changed.
+  bool RefreshManagePasswordsIconView();
 
   // Shows the manage passwords bubble if there is a savable password.
   void ShowManagePasswordsBubbleIfNeeded();
 
 #if !defined(USE_AURA)
   // Helper for the Mouse event handlers that does all the real work.
   void OnMouseEvent(const ui::MouseEvent& event, UINT msg);
 #endif
 
   // Returns true if the suggest text is valid.
@@ skipping 117 matching lines @@
   // Used to register for notifications received by NotificationObserver.
   content::NotificationRegistrar registrar_;
 
   // Used to bind callback functions to this object.
   base::WeakPtrFactory<LocationBarView> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(LocationBarView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_LOCATION_BAR_LOCATION_BAR_VIEW_H_