Correct immersive mode gestures under rotation

chrome/browser/ui/views/frame/immersive_mode_controller_ash.h

 // Copyright 2012 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 CHROME_BROWSER_UI_VIEWS_FRAME_IMMERSIVE_MODE_CONTROLLER_ASH_H_
 #define CHROME_BROWSER_UI_VIEWS_FRAME_IMMERSIVE_MODE_CONTROLLER_ASH_H_
 
 #include "chrome/browser/ui/views/frame/immersive_mode_controller.h"
 
 #include "base/timer.h"
@@ skipping 37 matching lines @@
   // These methods are used to increment and decrement |revealed_lock_count_|.
   // If immersive mode is enabled, a transition from 1 to 0 in
   // |revealed_lock_count_| closes the top-of-window views and a transition
   // from 0 to 1 in |revealed_lock_count_| reveals the top-of-window views.
   void LockRevealedState(AnimateReveal animate_reveal);
   void UnlockRevealedState();
 
   // Shows the reveal view without any animations if immersive mode is enabled.
   void MaybeRevealWithoutAnimation();
 
+  // Call Add/RemovePreTargerHandler since the RootWindow or WindowObservers
+  // enabled state has changed.
+  void SetPreTargetHandler();
+
   // ImmersiveModeController overrides:
   virtual void Init(Delegate* delegate,
                     views::Widget* widget,
                     TopContainerView* top_container) OVERRIDE;
   virtual void SetEnabled(bool enabled) OVERRIDE;
   virtual bool IsEnabled() const OVERRIDE;
   virtual bool ShouldHideTabIndicators() const OVERRIDE;
   virtual bool ShouldHideTopViews() const OVERRIDE;
   virtual bool IsRevealed() const OVERRIDE;
   virtual void MaybeStackViewAtTop() OVERRIDE;
@@ skipping 187 matching lines @@
   base::WeakPtrFactory<ImmersiveModeControllerAsh> weak_ptr_factory_;
 
   // Tracks if the controller has seen a ET_GESTURE_SCROLL_BEGIN, without the
   // following events.
   bool gesture_begun_;
 
   DISALLOW_COPY_AND_ASSIGN(ImmersiveModeControllerAsh);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_FRAME_IMMERSIVE_MODE_CONTROLLER_ASH_H_