Replace Handle<> with Local in remaining gin/*

gin/test/file.cc

 // 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.
 
 #include "gin/test/file.h"
 
 #include <iostream>
 
 #include "base/bind.h"
 #include "base/files/file_enumerator.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/path_service.h"
 #include "gin/arguments.h"
 #include "gin/converter.h"
 #include "gin/object_template_builder.h"
 #include "gin/per_isolate_data.h"
 #include "gin/public/wrapper_info.h"
 
 using v8::ObjectTemplate;
 
 namespace gin {
 
 namespace {
 
-v8::Handle<v8::Value> ReadFileToString(gin::Arguments* args) {
+v8::Local<v8::Value> ReadFileToString(gin::Arguments* args) {
   std::string filename;
   if (!args->GetNext(&filename))
     return v8::Null(args->isolate());
 
   const base::FilePath& path = base::FilePath::FromUTF8Unsafe(filename);
   std::string contents;
   if (!ReadFileToString(path, &contents))
     return v8::Null(args->isolate());
 
   return gin::Converter<std::string>::ToV8(args->isolate(), contents);
 }
 
-v8::Handle<v8::Value> GetSourceRootDirectory(gin::Arguments* args) {
+v8::Local<v8::Value> GetSourceRootDirectory(gin::Arguments* args) {
   base::FilePath path;
   if (!PathService::Get(base::DIR_SOURCE_ROOT, &path))
     return v8::Null(args->isolate());
   return gin::Converter<std::string>::ToV8(args->isolate(),
                                            path.AsUTF8Unsafe());
 }
 
-v8::Handle<v8::Value> GetFilesInDirectory(gin::Arguments* args) {
+v8::Local<v8::Value> GetFilesInDirectory(gin::Arguments* args) {
   std::string filename;
   if (!args->GetNext(&filename))
     return v8::Null(args->isolate());
 
   const base::FilePath& path = base::FilePath::FromUTF8Unsafe(filename);
   if (!base::DirectoryExists(path))
     return v8::Null(args->isolate());
 
   std::vector<std::string> names;
   base::FileEnumerator e(path, false, base::FileEnumerator::FILES);
@@ skipping 19 matching lines @@
         .SetMethod("readFileToString", ReadFileToString)
         .SetMethod("getFilesInDirectory", GetFilesInDirectory)
         .SetMethod("getSourceRootDirectory", GetSourceRootDirectory)
         .Build();
     data->SetObjectTemplate(&g_wrapper_info, templ);
   }
   return templ->NewInstance();
 }
 
 }  // namespace gin