Replace Handle<> with Local in remaining gin/*

gin/wrapper_info.cc

 // Copyright 2013 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.
 
 #include "gin/public/wrapper_info.h"
 
 namespace gin {
 
-WrapperInfo* WrapperInfo::From(v8::Handle<v8::Object> object) {
+WrapperInfo* WrapperInfo::From(v8::Local<v8::Object> object) {
   if (object->InternalFieldCount() != kNumberOfInternalFields)
     return NULL;
   WrapperInfo* info = static_cast<WrapperInfo*>(
       object->GetAlignedPointerFromInternalField(kWrapperInfoIndex));
   return info->embedder == kEmbedderNativeGin ? info : NULL;
 }
 
 }  // namespace gin