Make the PPP wrappers take an Instance*.

ppapi/cpp/dev/selection_dev.h

 // 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.
 
 #ifndef PPAPI_CPP_DEV_SELECTION_DEV_H_
 #define PPAPI_CPP_DEV_SELECTION_DEV_H_
 
 #include "ppapi/c/dev/ppp_selection_dev.h"
 #include "ppapi/cpp/instance_handle.h"
 
@@ skipping 18 matching lines @@
 //   };
 //
 //   class MyInstance : public pp::Instance {
 //     MyInstance() : selection_(this) {
 //     }
 //
 //     MySelection selection_;
 //   };
 class Selection_Dev {
  public:
-  explicit Selection_Dev(const InstanceHandle& instance);
+  explicit Selection_Dev(Instance* instance);
   virtual ~Selection_Dev();
 
   // PPP_Selection_Dev functions exposed as virtual functions for you to
   // override.
   virtual Var GetSelectedText(bool html) = 0;
 
  private:
   InstanceHandle associated_instance_;
 };
 
 }  // namespace pp
 
 #endif  // PPAPI_CPP_DEV_SELECTION_DEV_H_