Added wrapper test class for touch_exploration_controller.

ui/chromeos/touch_exploration_controller.h

Index: ui/chromeos/touch_exploration_controller.h
diff --git a/ui/chromeos/touch_exploration_controller.h b/ui/chromeos/touch_exploration_controller.h
index e809bcd7b9378f0232a2137e4bd0f29e4f605f5a..17731ffcdb79dc3d22a644021dc49906dfedbba4 100644
--- a/ui/chromeos/touch_exploration_controller.h
+++ b/ui/chromeos/touch_exploration_controller.h
@@ -103,16 +103,9 @@ class UI_CHROMEOS_EXPORT TouchExplorationController
   explicit TouchExplorationController(aura::Window* root_window);
   virtual ~TouchExplorationController();
 
-  void CallTapTimerNowForTesting();
-  void CallTapTimerNowIfRunningForTesting();
-  void SetEventHandlerForTesting(ui::EventHandler* event_handler_for_testing);
-  bool IsInNoFingersDownStateForTesting() const;
-  bool IsInGestureInProgressStateForTesting() const;
-  // VLOGs should be suppressed in tests that generate a lot of logs,
-  // for example permutations of nine touch events.
-  void SuppressVLOGsForTesting(bool suppress);
-
  private:
+  friend class TouchExplorationControllerTestApi;
+
   // Overridden from ui::EventRewriter
   virtual ui::EventRewriteStatus RewriteEvent(
       const ui::Event& event,