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..9a66a26495e6db6624c2a2756dade6c7b43dcbf8 100644
--- a/ash/ash_touch_exploration_manager_chromeos.h
+++ b/ash/ash_touch_exploration_manager_chromeos.h
@@ -8,17 +8,24 @@
 #include <memory>
 
 #include "ash/ash_export.h"
+#include "ash/shell_observer.h"
 #include "ash/system/accessibility_observer.h"
 #include "base/macros.h"
+#include "base/scoped_observer.h"
 #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 {
 class CrasAudioHandler;
 }
 
+namespace keyboard {
+class KeyboardController;
+}
+
 namespace ash {
 class RootWindowController;
 
@@ -31,7 +38,9 @@ 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 ShellObserver {
  public:
   explicit AshTouchExplorationManager(
       RootWindowController* root_window_controller);
@@ -71,6 +80,14 @@ 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;
+
+  // ShellObserver overrides:
+  void OnVirtualKeyboardStateChanged(bool activated,
+                                     aura::Window* root_window) override;
+
   void UpdateTouchExplorationState();
   bool VolumeAdjustSoundEnabled();
 
@@ -79,6 +96,9 @@ class ASH_EXPORT AshTouchExplorationManager
   RootWindowController* root_window_controller_;
   chromeos::CrasAudioHandler* audio_handler_;
   const bool enable_chromevox_arc_support_;
+  ScopedObserver<keyboard::KeyboardController,
+                 keyboard::KeyboardControllerObserver>
+      keyboard_observer_;
 
   DISALLOW_COPY_AND_ASSIGN(AshTouchExplorationManager);
 };