Provision to start base::SimpleTestTickClock at initial ticks

chrome/browser/android/data_usage/data_use_tab_model_unittest.cc

Index: chrome/browser/android/data_usage/data_use_tab_model_unittest.cc
diff --git a/chrome/browser/android/data_usage/data_use_tab_model_unittest.cc b/chrome/browser/android/data_usage/data_use_tab_model_unittest.cc
index b180d64b85dfa47d1f070b0d12fbbb8b3a4a4513..7898e6732a21871870db55ee8023ea613869e926 100644
--- a/chrome/browser/android/data_usage/data_use_tab_model_unittest.cc
+++ b/chrome/browser/android/data_usage/data_use_tab_model_unittest.cc
@@ -79,10 +79,9 @@ class DataUseTabModelTest : public testing::Test {
             content::BrowserThread::IO),
         base::WeakPtr<ExternalDataUseObserver>());
 
-    tick_clock_ = new base::SimpleTestTickClock();
-
-    // Advance to non nil time.
-    tick_clock_->Advance(base::TimeDelta::FromSeconds(1));
+    // Start at a non nil time.
+    tick_clock_ = new base::SimpleTestTickClock(
+        base::TimeTicks() + base::TimeDelta::FromSeconds(1));
 
     // |tick_clock_| will be owned by |data_use_tab_model_|.
     data_use_tab_model_->tick_clock_.reset(tick_clock_);