mac: Stop using __weak.

chrome/browser/ui/cocoa/autofill/autofill_popup_base_view_cocoa.h

 // Copyright 2014 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_COCOA_AUTOFILL_AUTOFILL_POPUP_BASE_VIEW_COCOA_H_
 #define CHROME_BROWSER_UI_COCOA_AUTOFILL_AUTOFILL_POPUP_BASE_VIEW_COCOA_H_
 
 #import <Cocoa/Cocoa.h>
 
 #import "ui/base/cocoa/base_view.h"
 
 namespace autofill {
 class AutofillPopupViewDelegate;
 }
 
 @interface AutofillPopupBaseViewCocoa : BaseView {
  @private
-   __weak autofill::AutofillPopupViewDelegate* delegate_;
+   autofill::AutofillPopupViewDelegate* delegate_;  // weak
 }
 
 - (NSColor*)backgroundColor;
 - (NSColor*)borderColor;
 - (NSColor*)highlightColor;
 - (NSColor*)nameColor;
 - (NSColor*)separatorColor;
 - (NSColor*)subtextColor;
 - (NSColor*)warningColor;
 
@@ skipping 10 matching lines @@
 // Draws a thin separator in the popup UI.
 - (void)drawSeparatorWithBounds:(NSRect)bounds;
 
 // Messages from AutofillPopupViewBridge:
 - (void)updateBoundsAndRedrawPopup;
 - (void)showPopup;
 - (void)hidePopup;
 @end
 
 #endif  // CHROME_BROWSER_UI_COCOA_AUTOFILL_AUTOFILL_POPUP_BASE_VIEW_COCOA_H_