Refactor intra-strip panel drags by introducing PanelDragController.

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 "base/mac/cocoa_protocols.h"
@@ skipping 73 matching lines @@
 - (void)updateIconAndTitleLayout;
 
 // Various events that we'll need to redraw our titlebar for.
 - (void)didChangeFrame:(NSNotification*)notification;
 - (void)didChangeTheme:(NSNotification*)notification;
 - (void)didChangeMainWindow:(NSNotification*)notification;
 
 // Helpers to control title drag operation, called from more then one place.
 - (void)startDrag;
 - (void)endDrag:(BOOL)cancelled;
-- (void)dragWithDeltaX:(int)deltaX;
+- (void)dragWithDeltaX:(int)deltaX
+                deltaY:(int)deltaY;
 
   // Update the visibility of settings button.
 - (void)updateSettingsButtonVisibility:(BOOL)mouseOverWindow;
 - (void)checkMouseAndUpdateSettingsButtonVisibility;
 
 // Draw Attention methods - change appearance of titlebar to attract user.
 - (void)drawAttention;
 - (void)stopDrawingAttention;
 - (BOOL)isDrawingAttention;
 - (void)startGlintAnimation;
@@ skipping 19 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_