Allow chrome.send to pass number, boolean, null and arrays of those

webkit/glue/cpp_variant.h

 // Copyright (c) 2006-2008 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.
 
 /*
   This file contains the declaration for CppVariant, a type used by C++ classes
   that are to be bound to JavaScript objects.
 
   CppVariant exists primarily as an interface between C++ callers and the
   corresponding NPVariant type.  CppVariant also provides a number of
@@ skipping 79 matching lines @@
 
   // Converters.  The CppVariant must be of a type convertible to these values.
   // For example, ToInteger() works only if isNumber() is true.
   std::string ToString() const;
   int32_t ToInt32() const;
   double ToDouble() const;
   bool ToBoolean() const;
   // Returns a vector of strings for the specified argument. This is useful
   // for converting a JavaScript array of strings into a vector of strings.
   std::vector<std::string> ToStringVector() const;
+  // Returns a vector of CppVariabt for the specified variant. This should only
+  // be called on an Object. If the object has no "length" property an empty
+  // vector is returned
+  std::vector<CppVariant> ToVector() const;
 
   // Invoke method of the given name on an object with the supplied arguments.
   // The first argument should be the object on which the method is to be
   // invoked.  Returns whether the method was successfully invoked.  If the
   // method was invoked successfully, any return value is stored in the
   // CppVariant specified by result.
   bool Invoke(const std::string& method, const CppVariant* args,
               uint32 arg_count, CppVariant& result) const;
 };
 
 #endif  // WEBKIT_GLUE_CPP_VARIANT_H__