Make the PPP wrappers take an Instance*.

ppapi/cpp/dev/selection_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/selection_dev.h"
 
 #include "ppapi/cpp/instance.h"
 #include "ppapi/cpp/instance_handle.h"
 #include "ppapi/cpp/module.h"
 #include "ppapi/cpp/var.h"
@@ skipping 12 matching lines @@
   return static_cast<Selection_Dev*>(object)->
       GetSelectedText(PP_ToBool(html)).Detach();
 }
 
 const PPP_Selection_Dev ppp_selection = {
   &GetSelectedText
 };
 
 }  // namespace
 
-Selection_Dev::Selection_Dev(const InstanceHandle& instance)
+Selection_Dev::Selection_Dev(Instance* instance)
     : associated_instance_(instance) {
   Module::Get()->AddPluginInterface(kPPPSelectionInterface, &ppp_selection);
-  Instance::AddPerInstanceObject(instance, kPPPSelectionInterface, this);
+  instance->AddPerInstanceObject(kPPPSelectionInterface, this);
 }
 
 Selection_Dev::~Selection_Dev() {
   Instance::RemovePerInstanceObject(associated_instance_,
                                     kPPPSelectionInterface, this);
 }
 
 }  // namespace pp