Pepper and WebKit API change to support a plugin knowing if a scrollbar is an overlay one.

webkit/plugins/ppapi/ppapi_plugin_instance.h

Index: webkit/plugins/ppapi/ppapi_plugin_instance.h
===================================================================
--- webkit/plugins/ppapi/ppapi_plugin_instance.h	(revision 95420)
+++ webkit/plugins/ppapi/ppapi_plugin_instance.h	(working copy)
@@ -72,6 +72,7 @@
 class PPB_Graphics2D_Impl;
 class PPB_Graphics3D_Impl;
 class PPB_ImageData_Impl;
+class PPB_ScrollbarGroup_Impl;
 class PPB_Surface3D_Impl;
 class PPB_URLLoader_Impl;
 class PPB_URLRequestInfo_Impl;
@@ -199,6 +200,8 @@
                  int identifier);
   void SelectFindResult(bool forward);
   void StopFind();
+  void WillStartLiveResize();
+  void WillEndLiveResize();
 
   bool SupportsPrintInterface();
   int PrintBegin(const gfx::Rect& printable_area, int printer_dpi);
@@ -246,6 +249,9 @@
     return fullscreen_container_;
   }
 
+  // Callback to associate a full-frame instance's scrollgroup object.
+  void SetScrollbarGroup(PPB_ScrollbarGroup_Impl* scrollbar_group);
+
   // FunctionGroupBase overrides.
   virtual ::ppapi::thunk::PPB_Instance_FunctionAPI* AsPPB_Instance_FunctionAPI()
       OVERRIDE;
@@ -488,6 +494,11 @@
   uint32_t input_event_mask_;
   uint32_t filtered_input_event_mask_;
 
+  // For full-page plugin, if it has a ScrollbarGroup object, we keep a
+  // non-owning pointer to it so we can send WebKit page-resize and mouse move
+  // callbacks. This is needed on Lion for overlay scrollbars.
+  PPB_ScrollbarGroup_Impl* scrollbar_group_;
+
   DISALLOW_COPY_AND_ASSIGN(PluginInstance);
 };