Fix crash on NTP related to multi-profile extensions.

chrome/browser/autocomplete/extension_app_provider.cc

 // 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.
 
 #include "chrome/browser/autocomplete/extension_app_provider.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include "base/string16.h"
@@ skipping 91 matching lines @@
 
       extension_apps_.push_back(
           std::make_pair(UTF8ToUTF16((*app)->name()),
                          UTF8ToUTF16((*app)->GetFullLaunchURL().spec())));
     }
   }
 }
 
 void ExtensionAppProvider::RegisterForNotifications() {
   registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_LOADED,
-                 NotificationService::AllSources());
+                 Source<Profile>(profile_));
   registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_UNINSTALLED,
-                 NotificationService::AllSources());
+                 Source<Profile>(profile_));
 }
 
 void ExtensionAppProvider::Observe(int type,
                                    const NotificationSource& source,
                                    const NotificationDetails& details) {
   RefreshAppList();
 }
 
 int ExtensionAppProvider::CalculateRelevance(AutocompleteInput::Type type,
                                              int input_length,
@@ skipping 24 matching lines @@
     history::URLRow info;
     url_db->GetRowForURL(url, &info);
     type_count_boost =
         400 * (1.0 - (std::pow(static_cast<double>(2), -info.typed_count())));
   }
   int relevance = 575 + static_cast<int>(type_count_boost) +
                         static_cast<int>(fraction_boost);
   DCHECK_LE(relevance, kMaxRelevance);
   return relevance;
 }