Adds WmShell::IsTouchDown()

ash/common/wm_shell.h

 // Copyright 2016 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.
 
 #ifndef ASH_COMMON_WM_SHELL_H_
 #define ASH_COMMON_WM_SHELL_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 267 matching lines @@
   virtual void AddPointerWatcher(views::PointerWatcher* watcher) = 0;
   virtual void RemovePointerWatcher(views::PointerWatcher* watcher) = 0;
 
   // TODO: Move these back to LockStateController when that has been moved.
   void OnLockStateEvent(LockStateObserver::EventType event);
   void AddLockStateObserver(LockStateObserver* observer);
   void RemoveLockStateObserver(LockStateObserver* observer);
 
   void SetShelfDelegateForTesting(std::unique_ptr<ShelfDelegate> test_delegate);
 
+  // True if any touch points are down.
+  virtual bool IsTouchDown() = 0;
+
 #if defined(OS_CHROMEOS)
   LogoutConfirmationController* logout_confirmation_controller() {
     return logout_confirmation_controller_.get();
   }
 
   // TODO(jamescook): Remove this when VirtualKeyboardController has been moved.
   virtual void ToggleIgnoreExternalKeyboard() = 0;
 #endif
 
  protected:
@@ skipping 67 matching lines @@
   bool simulate_modal_window_open_for_testing_ = false;
 
 #if defined(OS_CHROMEOS)
   std::unique_ptr<LogoutConfirmationController> logout_confirmation_controller_;
 #endif
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_WM_SHELL_H_