Split mode incognito extension can get misleading pref changed events from regular mode

chrome/browser/extensions/extension_event_router.cc

 // Copyright (c) 2012 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 "chrome/browser/extensions/extension_event_router.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/message_loop.h"
 #include "base/values.h"
@@ skipping 363 matching lines @@
       listener_profile->GetExtensionService()->process_map();
   // If the event is privileged, only send to extension processes. Otherwise,
   // it's OK to send to normal renderers (e.g., for content scripts).
   if (ExtensionAPI::GetSharedInstance()->IsPrivileged(event->event_name) &&
       !process_map->Contains(extension->id(), listener.process->GetID())) {
     return;
   }
 
   const Value* event_args = NULL;
   if (!CanDispatchEventToProfile(listener_profile, extension,
-                                 event, &event_args))
+                                 event, &event_args)) {
     return;
+  }
 
   DispatchEvent(listener.process, listener.extension_id,
                 event->event_name, *event_args,
                 event->event_url, event->user_gesture);
   IncrementInFlightEvents(listener_profile, extension);
 }
 
 bool ExtensionEventRouter::CanDispatchEventToProfile(
     Profile* profile,
     const Extension* extension,
@@ skipping 162 matching lines @@
       MessageLoop::current()->PostTask(FROM_HERE,
           base::Bind(&extensions::RuntimeEventRouter::DispatchOnInstalledEvent,
                      profile_, extension->id()));
       break;
     }
     default:
       NOTREACHED();
       return;
   }
 }