Refactor IsolateHolder to be able to always create the isolate

gin/test/file_runner.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/test/file_runner.h"
 
 #include "base/files/file_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/path_service.h"
+#include "gin/array_buffer.h"
 #include "gin/converter.h"
 #include "gin/modules/console.h"
 #include "gin/modules/module_registry.h"
 #include "gin/public/context_holder.h"
 #include "gin/public/isolate_holder.h"
 #include "gin/test/file.h"
 #include "gin/test/gc.h"
 #include "gin/test/gtest.h"
 #include "gin/try_catch.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 30 matching lines @@
 }
 
 void RunTestFromFile(const base::FilePath& path, FileRunnerDelegate* delegate,
                      bool run_until_idle) {
   ASSERT_TRUE(base::PathExists(path)) << path.LossyDisplayName();
   std::string source;
   ASSERT_TRUE(ReadFileToString(path, &source));
 
   base::MessageLoop message_loop;
 
-  gin::IsolateHolder instance(gin::IsolateHolder::kStrictMode);
+  gin::IsolateHolder::Initialize(gin::IsolateHolder::kStrictMode,
+                                 gin::ArrayBufferAllocator::SharedInstance());
+  gin::IsolateHolder instance;
   gin::ShellRunner runner(delegate, instance.isolate());
   {
     gin::Runner::Scope scope(&runner);
     v8::V8::SetCaptureStackTraceForUncaughtExceptions(true);
     runner.Run(source, path.AsUTF8Unsafe());
 
     if (run_until_idle) {
       message_loop.RunUntilIdle();
     } else {
       message_loop.Run();
     }
 
     v8::Handle<v8::Value> result = runner.global()->Get(
         StringToSymbol(runner.GetContextHolder()->isolate(), "result"));
     EXPECT_EQ("PASS", V8ToString(result));
   }
 }
 
 }  // namespace gin