Fix crash on NTP related to multi-profile extensions.

chrome/browser/extensions/extension_management_api.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/extensions/extension_management_api.h"
 
 #include <map>
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 406 matching lines @@
     chrome::NOTIFICATION_EXTENSION_INSTALLED,
     chrome::NOTIFICATION_EXTENSION_UNINSTALLED,
     chrome::NOTIFICATION_EXTENSION_LOADED,
     chrome::NOTIFICATION_EXTENSION_UNLOADED
   };
 
   CHECK(registrar_.IsEmpty());
   for (size_t i = 0; i < arraysize(types); i++) {
     registrar_.Add(this,
                    types[i],
-                   NotificationService::AllSources());
+                   Source<Profile>(profile_));
   }
 }
 
 void ExtensionManagementEventRouter::Observe(
     int type,
     const NotificationSource& source,
     const NotificationDetails& details) {
   const char* event_name = NULL;
   Profile* profile = Source<Profile>(source).ptr();
   CHECK(profile);
-  if (!profile_->IsSameProfile(profile)) {
-    return;
-  }
+  CHECK(profile_->IsSameProfile(profile));
 
   switch (type) {
     case chrome::NOTIFICATION_EXTENSION_INSTALLED:
       event_name = events::kOnExtensionInstalled;
       break;
     case chrome::NOTIFICATION_EXTENSION_UNINSTALLED:
       event_name = events::kOnExtensionUninstalled;
       break;
     case chrome::NOTIFICATION_EXTENSION_LOADED:
       event_name = events::kOnExtensionEnabled;
@@ skipping 23 matching lines @@
     bool enabled = service->GetExtensionById(extension->id(), false) != NULL;
     args.Append(CreateExtensionInfo(*extension, enabled));
   }
 
   std::string args_json;
   base::JSONWriter::Write(&args, false /* pretty_print */, &args_json);
 
   profile->GetExtensionEventRouter()->DispatchEventToRenderers(
       event_name, args_json, NULL, GURL());
 }