[PPAPI] Added VarResource_Dev class.

ppapi/cpp/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_CPP_VAR_H_
 #define PPAPI_CPP_VAR_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 117 matching lines @@
   /// This function determines if this <code>Var</code> is an array.
   ///
   /// @return true if this <code>Var</code> is an array, otherwise false.
   bool is_array() const { return var_.type == PP_VARTYPE_ARRAY; }
 
   /// This function determines if this <code>Var</code> is a dictionary.
   ///
   /// @return true if this <code>Var</code> is a dictionary, otherwise false.
   bool is_dictionary() const { return var_.type == PP_VARTYPE_DICTIONARY; }
 
+  /// This function determines if this <code>Var</code> is a resource.
+  ///
+  /// @return true if this <code>Var</code> is a resource, otherwise false.
+  bool is_resource() const { return var_.type == PP_VARTYPE_RESOURCE; }
+
   /// This function determines if this <code>Var</code> is an integer value.
   /// The <code>is_int</code> function returns the internal representation.
   /// The JavaScript runtime may convert between the two as needed, so the
   /// distinction may not be relevant in all cases (int is really an
   /// optimization inside the runtime). So most of the time, you will want
   /// to check is_number().
   ///
   /// @return true if this <code>Var</code> is an integer, otherwise false.
   bool is_int() const { return var_.type == PP_VARTYPE_INT32; }
 
@@ skipping 153 matching lines @@
  private:
   // Prevent an arbitrary pointer argument from being implicitly converted to
   // a bool at Var construction. If somebody makes such a mistake, (s)he will
   // get a compilation error.
   Var(void* non_scriptable_object_pointer);
 };
 
 }  // namespace pp
 
 #endif  // PPAPI_CPP_VAR_H_