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

Source/bindings/templates/callback_interface.h

Index: Source/bindings/templates/callback_interface.h
diff --git a/Source/bindings/templates/callback_interface.h b/Source/bindings/templates/callback_interface.h
index 28d72e33463105e58514a3e187fcc20eb342ebae..2b2cb73bb359fb88c9f0057df28758fcb9749a08 100644
--- a/Source/bindings/templates/callback_interface.h
+++ b/Source/bindings/templates/callback_interface.h
@@ -16,7 +16,7 @@ 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);
     }
@@ -27,7 +27,7 @@ public:
     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;