webkit/ppapi: Notify the container when a plugin is accepting wheel events just like r143871.

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 482 matching lines @@
   bool LoadTextInputInterface();
   bool LoadZoomInterface();
 
   // Determines if we think the plugin has focus, both content area and webkit
   // (see has_webkit_focus_ below).
   bool PluginHasFocus() const;
   void SendFocusChangeNotification();
 
   // Returns true if the plugin has registered to accept touch events.
   bool IsAcceptingTouchEvents() const;
+  // Returns true if the plugin has registered to accept wheel events.
+  bool IsAcceptingWheelEvents() const;
 
   void ScheduleAsyncDidChangeView();
   void SendAsyncDidChangeView();
   void SendDidChangeView();
 
   // Reports the current plugin geometry to the plugin by calling
   // DidChangeView.
   void ReportGeometry();
 
   // Queries the plugin for supported print formats and sets |format| to the
@@ skipping 242 matching lines @@
   // calls and handles PPB_ContentDecryptor_Private calls.
   scoped_ptr<ContentDecryptorDelegate> content_decryptor_delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(PluginInstance);
 };
 
 }  // namespace ppapi
 }  // namespace webkit
 
 #endif  // WEBKIT_PLUGINS_PPAPI_PPAPI_PLUGIN_INSTANCE_H_