[gin] Turn gin into a component

gin/arguments.h

 // 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.
 
 #ifndef GIN_ARGUMENTS_H_
 #define GIN_ARGUMENTS_H_
 
 #include "base/basictypes.h"
 #include "gin/converter.h"
+#include "gin/gin_export.h"
 
 namespace gin {
 
 // Arguments is a wrapper around v8::FunctionCallbackInfo that integrates
 // with Converter to make it easier to marshall arguments and return values
 // between V8 and C++.
-class Arguments {
+class GIN_EXPORT Arguments {
  public:
   Arguments();
   explicit Arguments(const v8::FunctionCallbackInfo<v8::Value>& info);
   ~Arguments();
 
   template<typename T>
   bool GetHolder(T* out) {
     return ConvertFromV8(isolate_, info_->Holder(), out);
   }
 
@@ skipping 43 matching lines @@
  private:
   v8::Isolate* isolate_;
   const v8::FunctionCallbackInfo<v8::Value>* info_;
   int next_;
   bool insufficient_arguments_;
 };
 
 }  // namespace gin
 
 #endif  // GIN_ARGUMENTS_H_