Added a workaround for Windows compilation problems related to V8EXPORT.

The underlying problem is a bit unclear, but at least this CL makes VS happy.

BUG=v8:2507

Review URL: https://codereview.chromium.org/12039037

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@13470 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

include/v8.h

@@ -614,7 +614,7 @@ class V8EXPORT ScriptData {  // NOLINT
 /**
  * The origin, within a file, of a script.
  */
-class V8EXPORT ScriptOrigin {
+class ScriptOrigin {
  public:
   V8_INLINE(ScriptOrigin(
       Handle<Value> resource_name,