Implement "iframe shim" behavior for windowed plugins....

webkit/glue/webplugin.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_H__
 #define WEBKIT_GLUE_WEBPLUGIN_H__
 
 #include <string>
 #include <vector>
 
@@ skipping 38 matching lines @@
 
   // A list of all the mime types that this plugin supports.
   std::vector<WebPluginMimeType> mime_types;
 };
 
 
 // Describes the new location for a plugin window.
 struct WebPluginGeometry {
   HWND window;
   gfx::Rect window_rect;
+  // Clip rect (include) and cutouts (excludes), relative to
+  // window_rect origin.
   gfx::Rect clip_rect;
+  std::vector<gfx::Rect> cutout_rects;
   bool visible;
 };
 
 
 enum RoutingStatus {
   ROUTED,
   NOT_ROUTED,
   INVALID_URL,
   GENERAL_FAILURE
 };
@@ skipping 82 matching lines @@
                                   bool* cancel) = 0;
   virtual void DidReceiveData(const char* buffer, int length, 
                               int data_offset) = 0;
   virtual void DidFinishLoading() = 0;
   virtual void DidFail() = 0;
 };
 
 
 #endif  // #ifndef WEBKIT_GLUE_WEBPLUGIN_H__