Added IPC ParamTraits for TimeDelta.

Already reviewed as part of http://codereview.chromium.org/3794011/show

TBR=kbr@chromium.org
TEST=try
BUG=none

Review URL: http://codereview.chromium.org/4026004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@63435 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 28 insertions, 0 deletions

diff --git a/ipc/ipc_message_utils.cc b/ipc/ipc_message_utils.cc
index 9664810..cc10cc2 100644
--- a/ipc/ipc_message_utils.cc
+++ b/ipc/ipc_message_utils.cc
@@ -250,6 +250,25 @@ void ParamTraits<base::Time>::Log(const param_type& p, std::string* l) {
   ParamTraits<int64>::Log(p.ToInternalValue(), l);
 }
 
+void ParamTraits<base::TimeDelta> ::Write(Message* m, const param_type& p) {
+  ParamTraits<int64> ::Write(m, p.InMicroseconds());
+}
+
+bool ParamTraits<base::TimeDelta> ::Read(const Message* m,
+                                         void** iter,
+                                         param_type* r) {
+  int64 value;
+  bool ret = ParamTraits<int64> ::Read(m, iter, &value);
+  if (ret)
+    *r = base::TimeDelta::FromMicroseconds(value);
+
+  return ret;
+}
+
+void ParamTraits<base::TimeDelta> ::Log(const param_type& p, std::string* l) {
+  ParamTraits<int64> ::Log(p.InMicroseconds(), l);
+}
+
 void ParamTraits<DictionaryValue>::Write(Message* m, const param_type& p) {
   WriteValue(m, &p, 0);
 }
diff --git a/ipc/ipc_message_utils.h b/ipc/ipc_message_utils.h
index 0e22c6b..9629fac 100644
--- a/ipc/ipc_message_utils.h
+++ b/ipc/ipc_message_utils.h
@@ -88,6 +88,7 @@ class NullableString16;
 
 namespace base {
 class Time;
+class TimeDelta;
 struct FileDescriptor;
 }
 
@@ -293,6 +294,14 @@ struct ParamTraits<base::Time> {
   static void Log(const param_type& p, std::string* l);
 };
 
+template <>
+struct ParamTraits<base::TimeDelta> {
+  typedef base::TimeDelta 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);
+};
+
 #if defined(OS_WIN)
 template <>
 struct ParamTraits<LOGFONT> {