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

ppapi/proxy/resource_creation_proxy.cc

 // Copyright (c) 2011 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.
 
 #include "ppapi/proxy/resource_creation_proxy.h"
 
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/c/pp_size.h"
 #include "ppapi/proxy/host_resource.h"
 #include "ppapi/proxy/interface_id.h"
@@ skipping 245 matching lines @@
     PP_Instance instance,
     PP_Config3D_Dev config,
     PP_Resource share_context,
     const int32_t* attrib_list) {
   // Not proxied. The raw creation function is used only in the implementation
   // of the proxy on the host side.
   return 0;
 }
 
 PP_Resource ResourceCreationProxy::CreateScrollbar(PP_Instance instance,
+                                                   PP_Resource scrollbar_group,
                                                    PP_Bool vertical) {
   NOTIMPLEMENTED();  // Not proxied yet.
   return 0;
 }
 
+PP_Resource ResourceCreationProxy::CreateScrollbarGroup(PP_Instance instance) {
+  NOTIMPLEMENTED();  // Not proxied yet.
+  return 0;
+}
+
 PP_Resource ResourceCreationProxy::CreateSurface3D(
     PP_Instance instance,
     PP_Config3D_Dev config,
     const int32_t* attrib_list) {
   return PPB_Surface3D_Proxy::CreateProxyResource(instance, config,
                                                   attrib_list);
 }
 
 PP_Resource ResourceCreationProxy::CreateTransport(PP_Instance instance,
                                                    const char* name,
@@ skipping 112 matching lines @@
       *result_image_handle = dispatcher_->ShareHandleWithRemote(ih, false);
 #else
       *result_image_handle = ImageData::HandleFromInt(handle);
 #endif
     }
   }
 }
 
 }  // namespace proxy
 }  // namespace pp