Support detaching/attaching panels via inter-strip drags.

chrome/browser/ui/panels/panel_window_controller_cocoa.h

 // Copyright (c) 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_PANELS_PANEL_WINDOW_CONTROLLER_COCOA_H_
 #define CHROME_BROWSER_UI_PANELS_PANEL_WINDOW_CONTROLLER_COCOA_H_
 
 // A class acting as the Objective-C controller for the Panel window
 // object. Handles interactions between Cocoa and the cross-platform
 // code. Each window has a single titlebar and is managed/owned by Panel.
@@ skipping 37 matching lines @@
   scoped_ptr<PanelBrowserWindowCocoa> windowShim_;
   scoped_nsobject<NSString> pendingWindowTitle_;
   scoped_nsobject<TabContentsController> contentsController_;
   NSViewAnimation* boundsAnimation_;  // Lifetime controlled manually, needs
                                       // more then just |release| to terminate.
   BOOL animateOnBoundsChange_;
   ScopedCrTrackingArea windowTrackingArea_;
   BOOL throbberShouldSpin_;
   BOOL playingMinimizeAnimation_;
   float animationStopToShowTitlebarOnly_;
+  BOOL alwaysOnTop_;
 }
 
 // Load the browser window nib and do any Cocoa-specific initialization.
 - (id)initWithBrowserWindow:(PanelBrowserWindowCocoa*)window;
 
 - (ui::ThemeProvider*)themeProvider;
 - (ThemedWindowStyle)themedWindowStyle;
 - (NSPoint)themePatternPhase;
 
 - (void)tabInserted:(content::WebContents*)contents;
@@ skipping 69 matching lines @@
 
 // Helper for NSWindow, returns NO for minimized panels in some cases, so they
 // are not un-minimized when another panel is minimized.
 - (BOOL)canBecomeKeyWindow;
 
 // Returns width of titlebar when shown in "icon only" mode.
 - (int)titlebarIconOnlyWidthInScreenCoordinates;
 
 - (void)ensureFullyVisible;
 
+- (void)setAlwaysOnTop:(bool)onTop;
+
+- (void)updateWindowLevel;
+
 @end  // @interface PanelWindowController
 
 #endif  // CHROME_BROWSER_UI_PANELS_PANEL_WINDOW_CONTROLLER_COCOA_H_