[PPAPI] Moving pp::VarResource_Dev API into pp::Var (now stable).

ppapi/cpp/dev/var_resource_dev.h

-// Copyright 2013 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_VAR_RESOURCE_DEV_H_
-#define PPAPI_CPP_VAR_RESOURCE_DEV_H_
-
-#include "ppapi/cpp/resource.h"
-#include "ppapi/cpp/var.h"
-
-/// @file
-/// This file defines the API for interacting with resource vars.
-
-namespace pp {
-
-class VarResource_Dev : public Var {
- public:
-  /// Constructs a <code>VarResource_Dev</code> given a resource.
-  explicit VarResource_Dev(const pp::Resource& resource);
-
-  /// Constructs a <code>VarResource_Dev</code> given a var for which
-  /// is_resource() is true. This will refer to the same resource var, but allow
-  /// you to access methods specific to resources.
-  ///
-  /// @param[in] var A resource var.
-  explicit VarResource_Dev(const Var& var);
-
-  /// Copy constructor.
-  VarResource_Dev(const VarResource_Dev& other);
-
-  virtual ~VarResource_Dev();
-
-  /// Assignment operator.
-  VarResource_Dev& operator=(const VarResource_Dev& other);
-
-  /// The <code>Var</code> assignment operator is overridden here so that we can
-  /// check for assigning a non-resource var to a <code>VarResource_Dev</code>.
-  ///
-  /// @param[in] other The resource var to be assigned.
-  ///
-  /// @return The resulting <code>VarResource_Dev</code> (as a
-  /// <code>Var</code>&).
-  virtual Var& operator=(const Var& other);
-
-  /// Gets the resource contained in the var.
-  ///
-  /// @return The <code>pp::Resource</code> that is contained in the var.
-  pp::Resource AsResource();
-};
-
-}  // namespace pp
-
-#endif  // PPAPI_CPP_VAR_RESOURCE_DEV_H_