Provision to start base::SimpleTestTickClock at initial ticks

ui/chromeos/touch_exploration_controller_unittest.cc

 // Copyright 2014 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.
 
 #include "ui/chromeos/touch_exploration_controller.h"
 
 #include <stddef.h>
 
 #include "base/macros.h"
 #include "base/test/simple_test_tick_clock.h"
@@ skipping 174 matching lines @@
   }
 
  private:
   scoped_ptr<TouchExplorationController> touch_exploration_controller_;
 
   DISALLOW_COPY_AND_ASSIGN(TouchExplorationControllerTestApi);
 };
 
 class TouchExplorationTest : public aura::test::AuraTestBase {
  public:
-  TouchExplorationTest() : simulated_clock_(new base::SimpleTestTickClock()) {
-    // Tests fail if time is ever 0.
-    simulated_clock_->Advance(base::TimeDelta::FromMilliseconds(10));
-  }
+  TouchExplorationTest()
+      :  // Tests fail if time is ever 0.
+        simulated_clock_(new base::SimpleTestTickClock(
+            base::TimeTicks() + base::TimeDelta::FromMilliseconds(10))) {}
   ~TouchExplorationTest() override {}
 
   void SetUp() override {
     if (gfx::GetGLImplementation() == gfx::kGLImplementationNone)
       gfx::GLSurfaceTestSupport::InitializeOneOff();
     aura::test::AuraTestBase::SetUp();
     cursor_client_.reset(new aura::test::TestCursorClient(root_window()));
     root_window()->AddPreTargetHandler(&event_capturer_);
     generator_.reset(new test::EventGenerator(root_window()));
     // The generator takes ownership of the tick clock.
@@ skipping 1727 matching lines @@
     generator_->PressTouch();
     generator_->MoveTouch(initial_press);
     generator_->MoveTouch(*point);
     generator_->ReleaseTouch();
     ASSERT_EQ(1U, delegate_.NumExitScreenSounds());
     delegate_.ResetCountersToZero();
   }
 }
 
 }  // namespace ui