Convert use of int ms to TimeDelta in files owned by brettw.

chrome/common/worker_thread_ticker_unittest.cc

Index: chrome/common/worker_thread_ticker_unittest.cc
diff --git a/chrome/common/worker_thread_ticker_unittest.cc b/chrome/common/worker_thread_ticker_unittest.cc
index b999c3372a711e73201beab4731465acfeec97b0..9099a623d1d2a1730479567a52e73c85367dcaaf 100644
--- a/chrome/common/worker_thread_ticker_unittest.cc
+++ b/chrome/common/worker_thread_ticker_unittest.cc
@@ -32,13 +32,15 @@ class TestCallback : public WorkerThreadTicker::Callback {
 class LongCallback : public WorkerThreadTicker::Callback {
  public:
   virtual void OnTick() {
-    base::PlatformThread::Sleep(1500);
+    base::PlatformThread::Sleep(base::TimeDelta::FromMilliseconds(1500));
   }
 };
 
 void RunMessageLoopForAWhile() {
-  MessageLoop::current()->PostDelayedTask(FROM_HERE,
-                                          MessageLoop::QuitClosure(), 500);
+  MessageLoop::current()->PostDelayedTask(
+      FROM_HERE,
+      MessageLoop::QuitClosure(),
+      base::TimeDelta::FromMilliseconds(500));
   MessageLoop::current()->Run();
 }