Add a keyboard shortcut on Escape that emits the IDC_STOP command....

chrome/browser/cocoa/browser_window_cocoa.mm

 // 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.
 
 #include "app/l10n_util_mac.h"
 #include "base/gfx/rect.h"
 #include "base/keyboard_codes.h"
 #include "base/logging.h"
 #include "base/sys_string_conversions.h"
 #include "chrome/app/chrome_dll_resource.h"
@@ skipping 468 matching lines @@
     // binding. Other than that, the |redispatchEvent| call would take care of
     // invoking the original menu item shortcut as well.
     if ([[NSApp mainMenu] performKeyEquivalent:event])
       return true;
 
     if ([event_window handleExtraBrowserKeyboardShortcut:event])
       return true;
 
     if ([event_window handleExtraWindowKeyboardShortcut:event])
       return true;
+
+    if ([event_window handleDelayedWindowKeyboardShortcut:event])
+      return true;
   }
 
   return [event_window redispatchEvent:event];
 }
 
 void BrowserWindowCocoa::ShowCreateShortcutsDialog(TabContents* tab_contents) {
   NOTIMPLEMENTED();
 }
 
 void BrowserWindowCocoa::Observe(NotificationType type,
@@ skipping 10 matching lines @@
       break;
   }
 }
 
 void BrowserWindowCocoa::DestroyBrowser() {
   [controller_ destroyBrowser];
 
   // at this point the controller is dead (autoreleased), so
   // make sure we don't try to reference it any more.
 }