Fix a race in WorkerThreadTicker test.

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 75e86691662a4783d73e0ce410e03e31b5e40216..71b74c8ace962819f90b9ea33fa5942cc32d9206 100644
--- a/chrome/common/worker_thread_ticker_unittest.cc
+++ b/chrome/common/worker_thread_ticker_unittest.cc
@@ -47,8 +47,8 @@ void RunMessageLoopForAWhile() {
 TEST(WorkerThreadTickerTest, Basic) {
   MessageLoop loop;
 
-  WorkerThreadTicker ticker(50);
   TestCallback callback;
+  WorkerThreadTicker ticker(50);
   EXPECT_FALSE(ticker.IsRunning());
   EXPECT_TRUE(ticker.RegisterTickHandler(&callback));
   EXPECT_TRUE(ticker.UnregisterTickHandler(&callback));
@@ -65,8 +65,8 @@ TEST(WorkerThreadTickerTest, Basic) {
 TEST(WorkerThreadTickerTest, Callback) {
   MessageLoop loop;
 
-  WorkerThreadTicker ticker(50);
   TestCallback callback;
+  WorkerThreadTicker ticker(50);
   ASSERT_TRUE(ticker.RegisterTickHandler(&callback));
 
   ASSERT_TRUE(ticker.Start());
@@ -99,8 +99,8 @@ TEST(WorkerThreadTickerTest, OutOfScope) {
 TEST(WorkerThreadTickerTest, LongCallback) {
   MessageLoop loop;
 
-  WorkerThreadTicker ticker(50);
   LongCallback callback;
+  WorkerThreadTicker ticker(50);
   ASSERT_TRUE(ticker.RegisterTickHandler(&callback));
 
   ASSERT_TRUE(ticker.Start());