Add more logging on a NOTREACHED() in hopes of getting more data about why we...

chrome/common/notification_registrar.cc

 // Copyright (c) 2006-2008 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/common/notification_registrar.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "chrome/common/notification_service.h"
@@ skipping 30 matching lines @@
   NotificationService::current()->AddObserver(observer, type, source);
 }
 
 void NotificationRegistrar::Remove(NotificationObserver* observer,
                                    NotificationType type,
                                    const NotificationSource& source) {
   Record record = { observer, type, source };
   RecordVector::iterator found = std::find(
       registered_.begin(), registered_.end(), record);
   if (found == registered_.end()) {
-    NOTREACHED();
+    NOTREACHED() << "Trying to remove unregistered observer of type " <<
+        type.value << " from list of size " << registered_.size() << ".";
     return;
   }
   registered_.erase(found);
 
   // This can be NULL if our owner outlives the NotificationService, e.g. if our
   // owner is a Singleton.
   NotificationService* service = NotificationService::current();
   if (service)
     service->RemoveObserver(observer, type, source);
 }
@@ skipping 17 matching lines @@
                               registered_[i].type,
                               registered_[i].source);
     }
   }
   registered_.clear();
 }
 
 bool NotificationRegistrar::IsEmpty() const {
   return registered_.empty();
 }