Replace NPObject usage in ppapi with gin

ppapi/shared_impl/scoped_pp_var.h

 // Copyright (c) 2012 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_SHARED_IMPL_SCOPED_PP_VAR_H_
 #define PPAPI_SHARED_IMPL_SCOPED_PP_VAR_H_
 
 #include <stdlib.h>
 
 #include "base/macros.h"
@@ skipping 45 matching lines @@
   // TODO(raymes): Add compatibility for arrays allocated with C++ "new".
   ScopedPPVarArray(const PassPPBMemoryAllocatedArray&,
                    PP_Var* array,
                    size_t size);
 
   explicit ScopedPPVarArray(size_t size);
   ~ScopedPPVarArray();
 
   // Passes ownership of the vars and the underlying array memory to the caller.
   // Note that the memory has been allocated with PPB_Memory_Dev.
-  PP_Var* Release(const PassPPBMemoryAllocatedArray&, size_t* size);
+  PP_Var* Release(const PassPPBMemoryAllocatedArray&);
 
   PP_Var* get() { return array_; }
   size_t size() { return size_; }
 
-  // Adds a ref to |var|. The refcount of the existing var will be decremented.
-  void Set(size_t index, PP_Var var);
+  // Takes a ref to |var|. The refcount of the existing var will be decremented.
+  void Set(size_t index, const ScopedPPVar& var);
   const PP_Var& operator[](size_t index) { return array_[index]; }
 
  private:
   // TODO(raymes): Consider supporting copy/assign.
   DISALLOW_COPY_AND_ASSIGN(ScopedPPVarArray);
 
   PP_Var* array_;
   size_t size_;
 };
 
 }  // namespace ppapi
 
 #endif  // PPAPI_SHARED_IMPL_SCOPED_PP_VAR_H_