mac: Remove now-unneeded includes of cocoa_protocols.h

chrome/browser/ui/panels/panel_titlebar_view_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_TITLEBAR_VIEW_COCOA_H_
 #define CHROME_BROWSER_UI_PANELS_PANEL_TITLEBAR_VIEW_COCOA_H_
 
 #import <Cocoa/Cocoa.h>
 
-#import "base/mac/cocoa_protocols.h"
 #import "chrome/browser/ui/cocoa/tracking_area.h"
 
 @class CrTrackingArea;
 @class HoverImageButton;
 @class PanelWindowControllerCocoa;
 
 // A class that works as a custom titlebar for Panels. It is placed on top of
 // the regular Cocoa titlebar. We paint theme image on it, and it's
 // the place for the close button, page favicon, title label and a button to
 // minimize/restore the panel.
@@ skipping 117 matching lines @@
 - (void)pressLeftMouseButtonTitlebar:(NSPoint)mouseLocation
                            modifiers:(int)modifierFlags;
 - (void)releaseLeftMouseButtonTitlebar:(int)modifierFlags;
 - (void)dragTitlebar:(NSPoint)mouseLocation;
 - (void)cancelDragTitlebar;
 - (void)finishDragTitlebar;
 
 @end  // @interface PanelTitlebarViewCocoa(TestingAPI)
 
 #endif  // CHROME_BROWSER_UI_PANELS_PANEL_TITLEBAR_VIEW_COCOA_H_