Mac Panels interaction with Dock modifications. (step 1)

chrome/browser/ui/panels/panel_titlebar_view_cocoa.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.
 
 #ifndef CHROME_BROWSER_UI_PANELS_PANEL_TITLEBAR_VIEW_COCOA_H_
 #define CHROME_BROWSER_UI_PANELS_PANEL_TITLEBAR_VIEW_COCOA_H_
 
 #import <Cocoa/Cocoa.h>
 
 #import "chrome/browser/ui/cocoa/tracking_area.h"
@@ skipping 31 matching lines @@
   IBOutlet NSView* settingsButtonWrapper_;
   IBOutlet HoverImageButton* settingsButton_;
   // Transparent view on top of entire titlebar. It catches mouse events to
   // prevent window activation by the system on mouseDown.
   IBOutlet NSView* overlay_;
   NSButton* closeButton_;  // Created explicitly, not from NIB. Weak, destroyed
                            // when view is destroyed, as a subview.
   ScopedCrTrackingArea closeButtonTrackingArea_;
   PanelDragState dragState_;
   BOOL isDrawingAttention_;
+  NSPoint dragStartLocation_;
 }
 
   // Callback from Close button.
 - (void)onCloseButtonClick:(id)sender;
 
   // Callback from Settings button.
 - (void)onSettingsButtonClick:(id)sender;
 
   // Attaches this view to the controller_'s window as a titlebar.
 - (void)attach;
@@ skipping 41 matching lines @@
 - (void)pressLeftMouseButtonTitlebar;
 - (void)releaseLeftMouseButtonTitlebar;
 - (void)dragTitlebarDeltaX:(double)delta_x
                     deltaY:(double)delta_y;
 - (void)cancelDragTitlebar;
 - (void)finishDragTitlebar;
 
 @end  // @interface PanelTitlebarViewCocoa(TestingAPI)
 
 #endif  // CHROME_BROWSER_UI_PANELS_PANEL_TITLEBAR_VIEW_COCOA_H_