Replace Handle<> with Local in remaining gin/*

gin/per_context_data.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/per_context_data.h"
 
 #include "base/logging.h"
 #include "gin/public/context_holder.h"
 #include "gin/public/wrapper_info.h"
 
 namespace gin {
 
 PerContextData::PerContextData(ContextHolder* context_holder,
-                               v8::Handle<v8::Context> context)
+                               v8::Local<v8::Context> context)
     : context_holder_(context_holder),
       runner_(NULL) {
   context->SetAlignedPointerInEmbedderData(
       kPerContextDataStartIndex + kEmbedderNativeGin, this);
 }
 
 PerContextData::~PerContextData() {
   v8::HandleScope handle_scope(context_holder_->isolate());
   context_holder_->context()->SetAlignedPointerInEmbedderData(
       kPerContextDataStartIndex + kEmbedderNativeGin, NULL);
 }
 
 // static
-PerContextData* PerContextData::From(v8::Handle<v8::Context> context) {
+PerContextData* PerContextData::From(v8::Local<v8::Context> context) {
   return static_cast<PerContextData*>(
       context->GetAlignedPointerFromEmbedderData(kEncodedValueIndex));
 }
 
 }  // namespace gin