OSX: Remove some nsnotificationcenter observers more reliably.

chrome/app/keystone_glue.m

 // Copyright (c) 2009 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 "keystone_glue.h"
 
 @interface KeystoneGlue(Private)
 
 // Called periodically to announce activity by pinging the Keystone server.
 - (void)markActive:(NSTimer*)timer;
@@ skipping 55 matching lines @@
   }
   return sDefaultKeystoneGlue;
 }
 
 - (void)dealloc {
   [url_ release];
   [productID_ release];
   [version_ release];
   [channel_ release];
   [registration_ release];
+  [[NSNotificationCenter defaultCenter] removeObserver:self];
   [super dealloc];
 }
 
 - (NSDictionary*)infoDictionary {
   return [[NSBundle mainBundle] infoDictionary];
 }
 
 - (void)loadParameters {
   NSDictionary* infoDictionary = [self infoDictionary];
   NSString* url = [infoDictionary objectForKey:@"KSUpdateURL"];
@@ skipping 134 matching lines @@
   [center addObserver:self
              selector:@selector(startUpdateComplete:)
                  name:KSRegistrationStartUpdateNotification
                object:nil];
   startTarget_ = [target retain];
   [registration_ startUpdate];
   return YES;
 }
 
 @end