FullscreenExitBubble temp UI for Mac.

chrome/browser/ui/cocoa/fullscreen_exit_bubble_controller.h

+// Copyright (c) 2011 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.
+
+#import <Cocoa/Cocoa.h>
+
+#import "base/mac/cocoa_protocols.h"
+#include "base/memory/scoped_nsobject.h"
+#include "googleurl/src/gurl.h"
+
+@class AnimatableView;
+class TabContentsWrapper;
+@class BrowserWindowController;
+class Browser;
+
+// The FullscreenExitBubbleController manages the bubble that tells the user
+// how to escape fullscreen mode. The bubble only appears when a tab requests
+// fullscreen mode via webkitRequestFullScreen().
+@interface FullscreenExitBubbleController :
+    NSViewController<NSTextViewDelegate> {
+ @private
+  BrowserWindowController* owner_;  // weak
+  Browser* browser_; // weak
+
+ @protected
+  IBOutlet NSTextField* exitLabelPlaceholder_;
+
+  // Text fields don't work as well with embedded links as text views, but
+  // text views cannot conveniently be created in IB. The xib file contains
+  // a text field |exitLabelPlaceholder_| that's replaced by this text view
+  // |exitLabel_| in -awakeFromNib.
+  scoped_nsobject<NSTextView> exitLabel_;
+
+  scoped_nsobject<NSTimer> hideTimer_;
+  scoped_nsobject<NSAnimation> hideAnimation_;
+};
+
+- (id)initWithOwner:(BrowserWindowController*)owner browser:(Browser*)browser;
+
+// Positions the fullscreen exit bubble in the top-center of the window.
+- (void)positionInWindowAtTop:(CGFloat)maxY width:(CGFloat)maxWidth;
+
+// Returns a pointer to this controller's view, cast as an AnimatableView.
+- (AnimatableView*)animatableView;
+
+@end