Ensure we check the page pointer before using it after we come out of NPP_Han...

webkit/glue/plugins/webplugin_delegate_impl.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_PLUGIN_WEBPLUGIN_DELEGATE_IMPL_H_
 #define WEBKIT_GLUE_PLUGIN_WEBPLUGIN_DELEGATE_IMPL_H_
 
 #include "build/build_config.h"
 
 #include <string>
@@ skipping 72 matching lines @@
                                                         intptr_t stream);
 
   virtual void URLRequestRouted(const std::string&url, bool notify_needed,
                                 intptr_t notify_data);
   virtual bool IsWindowless() const { return windowless_ ; }
   virtual const gfx::Rect& GetRect() const { return window_rect_; }
   virtual const gfx::Rect& GetClipRect() const { return clip_rect_; }
   virtual int GetQuirks() const { return quirks_; }
 
  private:
+  friend class DeleteTask<WebPluginDelegateImpl>;
+
   WebPluginDelegateImpl(gfx::NativeView containing_view,
                         NPAPI::PluginInstance *instance);
   ~WebPluginDelegateImpl();
 
   //--------------------------
   // used for windowed plugins
   void WindowedUpdateGeometry(const gfx::Rect& window_rect,
                               const gfx::Rect& clip_rect);
   // Create the native window.
   // Returns true if the window is created (or already exists).
@@ skipping 171 matching lines @@
 
   // Holds the current cursor set by the windowless plugin.
   WebCursor current_windowless_cursor_;
 
   friend class WebPluginDelegate;
 
   DISALLOW_EVIL_CONSTRUCTORS(WebPluginDelegateImpl);
 };
 
 #endif  // #ifndef WEBKIT_GLUE_PLUGIN_WEBPLUGIN_DELEGATE_IMPL_H_