Pepper: Add a function to PPB_Flash to check if a rect is topmost.

webkit/plugins/ppapi/ppapi_plugin_instance.h

 // Copyright (c) 2012 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_PLUGINS_PPAPI_PPAPI_PLUGIN_INSTANCE_H_
 #define WEBKIT_PLUGINS_PPAPI_PPAPI_PLUGIN_INSTANCE_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 273 matching lines @@
   // asynchronous. WebKit will trigger corresponding VewChanged calls.
   // Returns true on success, false on failure (e.g. trying to enter fullscreen
   // when not processing a user gesture or trying to set fullscreen when
   // already in fullscreen mode).
   bool SetFullscreen(bool fullscreen);
 
   // Implementation of PPB_Flash.
   int32_t Navigate(PPB_URLRequestInfo_Impl* request,
                    const char* target,
                    bool from_user_action);
+  bool IsRectTopmost(const gfx::Rect& rect);
 
   // Implementation of PPB_Gamepad.
   void SampleGamepads(PP_Instance instance, PP_GamepadsData_Dev* data)
       OVERRIDE;
 
   // Implementation of PPP_Messaging.
   void HandleMessage(PP_Var message);
 
   PluginDelegate::PlatformContext3D* CreateContext3D();
 
@@ skipping 309 matching lines @@
 
   PP_CompletionCallback lock_mouse_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(PluginInstance);
 };
 
 }  // namespace ppapi
 }  // namespace webkit
 
 #endif  // WEBKIT_PLUGINS_PPAPI_PPAPI_PLUGIN_INSTANCE_H_