[bindings] Use Local<> in lieu of Handle<> for the callback_interface.h/cpp in templates.

Source/bindings/templates/callback_interface.h

 // Copyright 2014 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 has been auto-generated by {{code_generator}}. DO NOT MODIFY!
 
 #ifndef {{v8_class}}_h
 #define {{v8_class}}_h
 
 {% filter conditional(conditional_string) %}
 {% for filename in header_includes %}
 #include "{{filename}}"
 {% endfor %}
 
 namespace blink {
 
 class {{v8_class}} final : public {{cpp_class}}, public ActiveDOMCallback {
 public:
-    static {{v8_class}}* create(v8::Handle<v8::Function> callback, ScriptState* scriptState)
+    static {{v8_class}}* create(v8::Local<v8::Function> callback, ScriptState* scriptState)
     {
         return new {{v8_class}}(callback, scriptState);
     }
 
     virtual ~{{v8_class}}();
 
 {% for method in methods %}
     virtual {{method.cpp_type}} {{method.name}}({{method.argument_declarations | join(', ')}}) override;
 {% endfor %}
 private:
-    {{v8_class}}(v8::Handle<v8::Function>, ScriptState*);
+    {{v8_class}}(v8::Local<v8::Function>, ScriptState*);
 
     ScopedPersistent<v8::Function> m_callback;
     RefPtr<ScriptState> m_scriptState;
 };
 
 }
 {% endfilter %}
 #endif // {{v8_class}}_h