Make v8::Handle as "deprecated soon"

src/extensions/externalize-string-extension.h

Index: src/extensions/externalize-string-extension.h
diff --git a/src/extensions/externalize-string-extension.h b/src/extensions/externalize-string-extension.h
index f8c54f8f1255281ff5e0d5b19643b3423bba6317..dc23ffd2d33e6a643d2a10cfb65b6fbe83ac2074 100644
--- a/src/extensions/externalize-string-extension.h
+++ b/src/extensions/externalize-string-extension.h
@@ -13,9 +13,8 @@ namespace internal {
 class ExternalizeStringExtension : public v8::Extension {
  public:
   ExternalizeStringExtension() : v8::Extension("v8/externalize", kSource) {}
-  virtual v8::Handle<v8::FunctionTemplate> GetNativeFunctionTemplate(
-      v8::Isolate* isolate,
-      v8::Handle<v8::String> name);
+  virtual v8::Local<v8::FunctionTemplate> GetNativeFunctionTemplate(
+      v8::Isolate* isolate, v8::Local<v8::String> name);
   static void Externalize(const v8::FunctionCallbackInfo<v8::Value>& args);
   static void IsOneByte(const v8::FunctionCallbackInfo<v8::Value>& args);