Switch to standard integer types in gin/.

gin/converter.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/converter.h"
 
+#include <stdint.h>
+
 #include "v8/include/v8.h"
 
 using v8::ArrayBuffer;
 using v8::Boolean;
 using v8::External;
 using v8::Function;
 using v8::Int32;
 using v8::Integer;
 using v8::Isolate;
 using v8::Local;
@@ skipping 201 matching lines @@
 std::string V8ToString(v8::Local<v8::Value> value) {
   if (value.IsEmpty())
     return std::string();
   std::string result;
   if (!ConvertFromV8(NULL, value, &result))
     return std::string();
   return result;
 }
 
 }  // namespace gin