Revert 124890 - Convert uses of int ms to TimeDelta in chrome/browser and net.

chrome/browser/metrics/histogram_synchronizer.cc

Index: chrome/browser/metrics/histogram_synchronizer.cc
===================================================================
--- chrome/browser/metrics/histogram_synchronizer.cc	(revision 124890)
+++ chrome/browser/metrics/histogram_synchronizer.cc	(working copy)
@@ -1,4 +1,4 @@
-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
@@ -78,7 +78,7 @@
 void HistogramSynchronizer::FetchRendererHistogramsAsynchronously(
     MessageLoop* callback_thread,
     const base::Closure& callback,
-    base::TimeDelta wait_time) {
+    int wait_time) {
   DCHECK(callback_thread != NULL);
   DCHECK(!callback.is_null());