[Mac] Inform reference counted objects that hold a weak Browser* when the Browser is being destroye…

chrome/browser/ui/cocoa/find_bar/find_bar_cocoa_controller.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.
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/mac/scoped_nsobject.h"
 #include "base/strings/string16.h"
 #include "ui/gfx/geometry/point.h"
 
@@ skipping 44 matching lines @@
 
   // Default width of FindBar.
   CGFloat defaultWidth_;
 };
 
 @property (readonly, nonatomic) NSView* findBarView;
 
 // Initializes a new FindBarCocoaController.
 - (id)initWithBrowser:(Browser*)browser;
 
+// Called by BrowserWindowController when the Browser is being destroyed.
+- (void)browserWillBeDestroyed;
+
 - (void)setFindBarBridge:(FindBarBridge*)findBar;
 
 - (IBAction)close:(id)sender;
 
 - (IBAction)nextResult:(id)sender;
 
 - (IBAction)previousResult:(id)sender;
 
 // Position the find bar at the given maximum y-coordinate (the min-y of the
 // bar -- toolbar + possibly bookmark bar, but not including the infobars) with
@@ skipping 21 matching lines @@
 - (BOOL)isFindBarAnimating;
 
 // Returns the FindBar's position in the superview's coordinates, but with
 // the Y coordinate growing down.
 - (gfx::Point)findBarWindowPosition;
 
 // Returns the width of the FindBar.
 - (int)findBarWidth;
 
 @end