Desynchronize windowless plugin painting. This greatly improves the painting...

chrome/renderer/webplugin_delegate_proxy.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 CHROME_RENDERER_WEBPLUGIN_DELEGATE_PROXY_H__
 #define CHROME_RENDERER_WEBPLUGIN_DELEGATE_PROXY_H__
 
 #include <set>
 #include <string>
 
 #include "base/gfx/rect.h"
 #include "base/ref_counted.h"
+#include "base/scoped_handle.h"
 #include "chrome/common/ipc_message.h"
 #include "chrome/common/plugin_messages.h"
 #include "chrome/plugin/npobject_stub.h"
 #include "chrome/renderer/plugin_channel_host.h"
 #include "webkit/glue/webplugin.h"
 #include "webkit/glue/webplugin_delegate.h"
 
 class GURL;
 struct PluginHostMsg_RouteToFrame_Params;
 class RenderView;
 class SkBitmap;
+namespace gfx {
+class PlatformCanvasWin;
+}
+
 
 // An implementation of WebPluginDelegate that proxies all calls to
 // the plugin process.
 class WebPluginDelegateProxy : public WebPluginDelegate,
                                public IPC::Channel::Listener,
                                public IPC::Message::Sender  {
  public:
   static WebPluginDelegateProxy* Create(const GURL& url,
                                         const std::string& mime_type,
                                         const std::string& clsid,
@@ skipping 101 matching lines @@
   gfx::Rect plugin_rect_;
   gfx::Rect deferred_clip_rect_;
   bool send_deferred_update_geometry_;
   bool visible_;
 
   NPObject* npobject_;
   NPObjectStub* window_script_object_;
 
   // Event passed in by the plugin process and is used to decide if
   // messages need to be pumped in the NPP_HandleEvent sync call.
-  HANDLE modal_loop_pump_messages_event_;
+  ScopedHandle modal_loop_pump_messages_event_;
 
   // Bitmap for crashed plugin
   SkBitmap* sad_plugin_;
 
+  // Used for desynchronized windowless painting.  See the comment in
+  // webplugin_proxy.h for information about how this works.
+  scoped_ptr<SharedMemory> windowless_buffer_;
+  scoped_ptr<gfx::PlatformCanvasWin> windowless_canvas_;
+  ScopedHandle windowless_buffer_lock_;
+
   DISALLOW_EVIL_CONSTRUCTORS(WebPluginDelegateProxy);
 };
 
 #endif  // #ifndef CHROME_RENDERER_WEBPLUGIN_DELEGATE_PROXY_H__