Improve scrolling performance when there are many windowed plugins in a page....

webkit/glue/webplugin_delegate.h

 // Copyright (c) 2006-2008 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 WEBKIT_GLUE_WEBPLUGIN_DELEGATE_H__
 #define WEBKIT_GLUE_WEBPLUGIN_DELEGATE_H__
 
 #include <string>
 #include <vector>
 
@@ skipping 30 matching lines @@
 
   // Called when the WebPlugin is being destroyed.  This is a signal to the
   // delegate that it should tear-down the plugin implementation and not call
   // methods on the WebPlugin again.
   virtual void PluginDestroyed() = 0;
 
   // Update the geometry of the plugin.  This is a request to move the
   // plugin, relative to its containing window, to the coords given by
   // window_rect.  Its contents should be clipped to the coords given
   // by clip_rect, which are relative to the origin of the plugin
-  // window.  It's contents should also not overlap the given cutout
-  // rects.  The clip_rect and cutout_rects are in plugin-relative
-  // coordinates.
+  // window.  The clip_rect is in plugin-relative coordinates.
   virtual void UpdateGeometry(const gfx::Rect& window_rect,
-                              const gfx::Rect& clip_rect,
-                              const std::vector<gfx::Rect>& cutout_rects,
-                              bool visible) = 0;
+                              const gfx::Rect& clip_rect) = 0;
 
   // Tells the plugin to paint the damaged rect.  The HDC is only used for
   // windowless plugins.
   virtual void Paint(HDC hdc, const gfx::Rect& rect) = 0;
 
   // Tells the plugin to print itself.
   virtual void Print(HDC hdc) = 0;
 
   // Informs the plugin that it now has focus.
   virtual void SetFocus() = 0;
@@ skipping 50 matching lines @@
                                                         void* stream) = 0;
   // Notifies the delegate about a Get/Post URL request getting routed
   virtual void URLRequestRouted(const std::string&url, bool notify_needed, 
                                 void* notify_data) = 0;
  private:
   DISALLOW_EVIL_CONSTRUCTORS(WebPluginDelegate);
 };
 
 #endif  // #ifndef WEBKIT_GLUE_WEBPLUGIN_DELEGATE_H__