Make the PPP wrappers take an Instance*.

ppapi/cpp/dev/widget_client_dev.cc

 // Copyright (c) 2010 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/cpp/dev/widget_client_dev.h"
 
 #include "ppapi/c/dev/ppp_scrollbar_dev.h"
 #include "ppapi/c/dev/ppp_widget_dev.h"
 #include "ppapi/cpp/dev/scrollbar_dev.h"
 #include "ppapi/cpp/dev/widget_dev.h"
@@ skipping 51 matching lines @@
       Scrollbar_Dev(scrollbar_id), PP_ToBool(overlay));
 }
 
 static PPP_Scrollbar_Dev scrollbar_interface = {
   &Scrollbar_ValueChanged,
   &Scrollbar_OverlayChanged,
 };
 
 }  // namespace
 
-WidgetClient_Dev::WidgetClient_Dev(const InstanceHandle& instance)
+WidgetClient_Dev::WidgetClient_Dev(Instance* instance)
     : associated_instance_(instance) {
   Module::Get()->AddPluginInterface(kPPPWidgetInterface, &widget_interface);
-  Instance::AddPerInstanceObject(instance, kPPPWidgetInterface, this);
+  instance->AddPerInstanceObject(kPPPWidgetInterface, this);
   Module::Get()->AddPluginInterface(kPPPScrollbarInterface,
                                     &scrollbar_interface);
-  Instance::AddPerInstanceObject(instance, kPPPScrollbarInterface, this);
+  instance->AddPerInstanceObject(kPPPScrollbarInterface, this);
 }
 
 WidgetClient_Dev::~WidgetClient_Dev() {
   Instance::RemovePerInstanceObject(associated_instance_,
                                     kPPPScrollbarInterface, this);
   Instance::RemovePerInstanceObject(associated_instance_,
                                     kPPPWidgetInterface, this);
 }
 
 }  // namespace pp