Add final part of IPC plumbing for FileSystem API

chrome/common/common_param_traits.h

Index: chrome/common/common_param_traits.h
diff --git a/chrome/common/common_param_traits.h b/chrome/common/common_param_traits.h
index da04edc95022e6d64680d0977c449ad9ee2997cf..c84c0f445f8bf0da86572ae773c634fd3b6c2b2e 100644
--- a/chrome/common/common_param_traits.h
+++ b/chrome/common/common_param_traits.h
@@ -15,6 +15,7 @@
 #include <vector>
 
 #include "app/surface/transport_dib.h"
+#include "base/file_util.h"
 #include "base/ref_counted.h"
 #include "chrome/common/content_settings.h"
 #include "chrome/common/page_zoom.h"
@@ -312,6 +313,14 @@ struct ParamTraits<printing::NativeMetafile> {
   static void Log(const param_type& p, std::string* l);
 };
 
+template <>
+struct ParamTraits<file_util::FileInfo> {
+  typedef file_util::FileInfo param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* r);
+  static void Log(const param_type& p, std::string* l);
+};
+
 }  // namespace IPC
 
 #endif  // CHROME_COMMON_COMMON_PARAM_TRAITS_H_