[gin] Turn gin into a component

gin/arguments.h

Index: gin/arguments.h
diff --git a/gin/arguments.h b/gin/arguments.h
index 1461dc8690f2c5c539cacaac958ba116ccf7bc8b..104152ab908fd8beecb0c3b50e6eea9802a03a48 100644
--- a/gin/arguments.h
+++ b/gin/arguments.h
@@ -7,13 +7,14 @@
 
 #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);