[Mac] Refactor the Fullscreen Toolbar Visibility Locks

chrome/browser/ui/cocoa/fullscreen/fullscreen_toolbar_visibility_lock_controller.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 CHROME_BROWSER_UI_COCOA_FULLSCREEN_FULLSCREEN_TOOLBAR_VISIBLITY_LOCK_CONTROLLER_H_
+#define CHROME_BROWSER_UI_COCOA_FULLSCREEN_FULLSCREEN_TOOLBAR_VISIBLITY_LOCK_CONTROLLER_H_
+
+#import <Cocoa/Cocoa.h>
+
+class FullscreenToolbarAnimationController;
+@class FullscreenToolbarController;
+
+// Various UI elements/events may want to ensure that the toolbar is visible in
+// fullscreen mode. Whenever an object requires toolbar visibility, it locks
+// it. When it no longer requires it, it releases it. This class manages the
+// toolbar visibility locks.
+@interface FullscreenToolbarVisibilityLockController : NSObject
+
+// The designated initializer.
+- (instancetype)
+initWithFullscreenToolbarController:(FullscreenToolbarController*)controller
+                animationController:
+                    (FullscreenToolbarAnimationController*)animationController;
+
+// Returns true if the toolbar visibility is locked.
+- (BOOL)isToolbarVisibilityLocked;
+
+// Returns true if the toolbar visibility is locked by |owner|.
+- (BOOL)isToolbarVisibilityLockedForOwner:(id)owner;
+
+// Methods for locking and releasing the toolbar visibility. If |animate| is
+// true, the toolbar will animate in/out.
+- (void)lockToolbarVisibilityForOwner:(id)owner withAnimation:(BOOL)animate;
+- (void)releaseToolbarVisibilityForOwner:(id)owner withAnimation:(BOOL)animate;
+
+@end
+
+#endif