Move ParamTraits<base::PlatformFileInfo> and <base::PlatformFileError>.

ipc/ipc_message_utils.h

Index: ipc/ipc_message_utils.h
===================================================================
--- ipc/ipc_message_utils.h	(revision 138610)
+++ ipc/ipc_message_utils.h	(working copy)
@@ -13,6 +13,7 @@
 #include <vector>
 
 #include "base/format_macros.h"
+#include "base/platform_file.h"
 #include "base/string16.h"
 #include "base/stringprintf.h"
 #include "base/string_util.h"
@@ -335,6 +336,19 @@
 };
 
 template <>
+struct IPC_EXPORT ParamTraits<base::PlatformFileInfo> {
+  typedef base::PlatformFileInfo param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, PickleIterator* iter, param_type* r);
+  static void Log(const param_type& p, std::string* l);
+};
+
+template <>
+struct SimilarTypeTraits<base::PlatformFileError> {
+  typedef int Type;
+};
+
+template <>
 struct IPC_EXPORT ParamTraits<base::Time> {
   typedef base::Time param_type;
   static void Write(Message* m, const param_type& p);