[Mac] Tear down extension-installed bubble before main window closes.

chrome/browser/ui/cocoa/extensions/extension_installed_bubble_controller.mm

 // 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 "chrome/browser/ui/cocoa/extensions/extension_installed_bubble_controller.h"
 
 #include "base/i18n/rtl.h"
 #include "base/mac/mac_util.h"
 #include "base/sys_string_conversions.h"
 #include "base/utf_string_conversions.h"
@@ skipping 89 matching lines @@
     } else if (extension->page_action() &&
                !extension->page_action()->default_icon_path().empty()) {
       type_ = extension_installed_bubble::kPageAction;
     } else {
       NOTREACHED();  // kGeneric installs handled in the extension_install_ui.
     }
 
     // Start showing window only after extension has fully loaded.
     extensionObserver_.reset(new ExtensionLoadedNotificationObserver(
         self, browser->profile()));
+
+    // Watch to see if the parent window closes, and if so, close this one.
+    NSNotificationCenter* center = [NSNotificationCenter defaultCenter];
+    [center addObserver:self
+               selector:@selector(parentWindowWillClose:)
+                   name:NSWindowWillCloseNotification
+                 object:parentWindow_];
   }
   return self;
 }
 
 - (void)dealloc {
   [[NSNotificationCenter defaultCenter] removeObserver:self];
   [super dealloc];
 }
 
 - (void)close {
-  [parentWindow_ removeChildWindow:[self window]];
+  [[[self window] parentWindow] removeChildWindow:[self window]];
   [super close];
 }
 
+- (void)parentWindowWillClose:(NSNotification*)notification {
+  [self close];
+}
+
 - (void)windowWillClose:(NSNotification*)notification {
   // Turn off page action icon preview when the window closes, unless we
   // already removed it when the window resigned key status.
   [self removePageActionPreviewIfNecessary];
   extension_ = NULL;
   browser_ = NULL;
   parentWindow_ = nil;
   // We caught a close so we don't need to watch for the parent closing.
   [[NSNotificationCenter defaultCenter] removeObserver:self];
   [self autorelease];
@@ skipping 236 matching lines @@
 
 - (NSRect)getExtensionInstalledInfoMsgFrame {
   return [extensionInstalledInfoMsg_ frame];
 }
 
 - (void)extensionUnloaded:(id)sender {
   extension_ = NULL;
 }
 
 @end