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

chrome/renderer/webplugin_delegate_proxy.cc

Index: chrome/renderer/webplugin_delegate_proxy.cc
===================================================================
--- chrome/renderer/webplugin_delegate_proxy.cc	(revision 2783)
+++ chrome/renderer/webplugin_delegate_proxy.cc	(working copy)
@@ -183,6 +183,7 @@
     Send(new PluginMsg_UpdateGeometry(instance_id_,
                                       plugin_rect_,
                                       deferred_clip_rect_,
+                                      deferred_cutout_rects_,
                                       visible_,
                                       NULL,
                                       NULL));
@@ -333,12 +334,15 @@
   render_view_->PluginCrashed(plugin_path_);
 }
 
-void WebPluginDelegateProxy::UpdateGeometry(const gfx::Rect& window_rect,
-                                            const gfx::Rect& clip_rect,
-                                            bool visible) {
+void WebPluginDelegateProxy::UpdateGeometry(
+                const gfx::Rect& window_rect,
+                const gfx::Rect& clip_rect,
+                const std::vector<gfx::Rect>& cutout_rects,
+                bool visible) {
   plugin_rect_ = window_rect;
   if (!windowless_) {
     deferred_clip_rect_ = clip_rect;
+    deferred_cutout_rects_ = cutout_rects;
     visible_ = visible;
     send_deferred_update_geometry_ = true;
     return;
@@ -369,8 +373,8 @@
   }
 
   IPC::Message* msg = new PluginMsg_UpdateGeometry(
-      instance_id_, window_rect, clip_rect, visible, transport_store_handle,
-      background_store_handle);
+      instance_id_, window_rect, clip_rect, cutout_rects, visible,
+      transport_store_handle, background_store_handle);
   msg->set_unblock(true);
   Send(msg);
 }