Implement touch exploration touch typing

ash/ash_touch_exploration_manager_chromeos.h

Index: ash/ash_touch_exploration_manager_chromeos.h
diff --git a/ash/ash_touch_exploration_manager_chromeos.h b/ash/ash_touch_exploration_manager_chromeos.h
index 736d45167696a9a414661720d5358a5ec21484c5..e1328dac56fff31524019f1492795080343b6920 100644
--- a/ash/ash_touch_exploration_manager_chromeos.h
+++ b/ash/ash_touch_exploration_manager_chromeos.h
@@ -13,6 +13,7 @@
 #include "ui/chromeos/touch_accessibility_enabler.h"
 #include "ui/chromeos/touch_exploration_controller.h"
 #include "ui/display/display_observer.h"
+#include "ui/keyboard/keyboard_controller_observer.h"
 #include "ui/wm/public/activation_change_observer.h"
 
 namespace chromeos {
@@ -31,7 +32,8 @@ class ASH_EXPORT AshTouchExplorationManager
       public ui::TouchExplorationControllerDelegate,
       public ui::TouchAccessibilityEnablerDelegate,
       public display::DisplayObserver,
-      public aura::client::ActivationChangeObserver {
+      public aura::client::ActivationChangeObserver,
+      public keyboard::KeyboardControllerObserver {
  public:
   explicit AshTouchExplorationManager(
       RootWindowController* root_window_controller);
@@ -71,6 +73,10 @@ class ASH_EXPORT AshTouchExplorationManager
   void SetTouchAccessibilityAnchorPoint(const gfx::Point& anchor_point);
 
  private:
+  // keyboard::KeyboardControllerObserver overrides:
+  void OnKeyboardBoundsChanging(const gfx::Rect& new_bounds) override;
+  void OnKeyboardClosed() override;
+
   void UpdateTouchExplorationState();
   bool VolumeAdjustSoundEnabled();