Provision to start base::SimpleTestTickClock at initial ticks

mojo/message_pump/handle_watcher_unittest.cc

Index: mojo/message_pump/handle_watcher_unittest.cc
diff --git a/mojo/message_pump/handle_watcher_unittest.cc b/mojo/message_pump/handle_watcher_unittest.cc
index 14c1851202f3682dcabef1076d072b40969e5b54..4ee97a2ae9844ee6ef23d98959d0e05c5230bf0e 100644
--- a/mojo/message_pump/handle_watcher_unittest.cc
+++ b/mojo/message_pump/handle_watcher_unittest.cc
@@ -121,7 +121,9 @@ class CallbackHelper {
 
 class HandleWatcherTest : public testing::TestWithParam<MessageLoopConfig> {
  public:
-  HandleWatcherTest() : message_loop_(CreateMessageLoop(GetParam())) {}
+  HandleWatcherTest()
+      : tick_clock_(base::TimeTicks()),
+        message_loop_(CreateMessageLoop(GetParam())) {}
   virtual ~HandleWatcherTest() {
     test::SetTickClockForTest(NULL);
   }