[PPAPI] Added VarResource_Dev class.

ppapi/cpp/var.h

Index: ppapi/cpp/var.h
diff --git a/ppapi/cpp/var.h b/ppapi/cpp/var.h
index fe30e10614b23c7ba44d1fbf6a31a96eafcd4749..5cb26d9ee83a00d0ff41b0fccf259adf0f38cd0c 100644
--- a/ppapi/cpp/var.h
+++ b/ppapi/cpp/var.h
@@ -135,6 +135,11 @@ class Var {
   /// @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