Add a dependency from Gin to base

gin/initialize.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/initialize.h"
 
 #include <stdlib.h>
 #include <string.h>
 
 #include "gin/array_buffer.h"
 #include "gin/per_isolate_data.h"
 
 namespace gin {
 
 namespace {
 
 bool GenerateEntropy(unsigned char* buffer, size_t amount) {
   // TODO(abarth): Gin needs a source of entropy.
   return false;
 }
 
 const char kFlags[] = "--use_strict --harmony";
 
 }
 
 void Initialize() {
   v8::V8::SetArrayBufferAllocator(ArrayBufferAllocator::SharedInstance());
   v8::V8::InitializeICU();
   v8::V8::SetFlagsFromString(kFlags,
-      static_cast<uint32_t>(sizeof(kFlags) / sizeof(kFlags[0])) - 1);
+      static_cast<uint32_t>(arraysize(kFlags)) - 1);
   v8::V8::SetEntropySource(&GenerateEntropy);
   v8::V8::Initialize();
 
   v8::Isolate* isolate = v8::Isolate::GetCurrent();
   v8::HandleScope handle_scope(isolate);
   new PerIsolateData(isolate);
 }
 
 }  // namespace gin