Add a Create method to DesktopNotificationHandler and stubs for the notification objects.

chrome/browser/background_contents_service.cc

Index: chrome/browser/background_contents_service.cc
diff --git a/chrome/browser/background_contents_service.cc b/chrome/browser/background_contents_service.cc
index d6de00f7a15c5d643a0375c7327abf38f04ddb33..9ed820dcd2d0a2b93daf163213a4084f3e7c7018 100644
--- a/chrome/browser/background_contents_service.cc
+++ b/chrome/browser/background_contents_service.cc
@@ -100,14 +100,12 @@ void ShowBalloon(const Extension* extension, Profile* profile) {
       extension->is_hosted_app() ?  IDS_BACKGROUND_CRASHED_APP_BALLOON_MESSAGE :
       IDS_BACKGROUND_CRASHED_EXTENSION_BALLOON_MESSAGE,
       UTF8ToUTF16(extension->name()));
-  string16 content_url = DesktopNotificationService::CreateDataUrl(
+  DesktopNotificationService::ShowBalloon(
+      extension->url(),
       extension->GetIconURL(Extension::EXTENSION_ICON_SMALLISH,
                             ExtensionIconSet::MATCH_BIGGER),
-      string16(), message, WebKit::WebTextDirectionDefault);
-  Notification notification(
-      extension->url(), GURL(content_url), string16(), string16(),
-      new CrashNotificationDelegate(profile, extension));
-  g_browser_process->notification_ui_manager()->Add(notification, profile);
+      string16(), message, new CrashNotificationDelegate(profile, extension),
+      profile);
 }
 
 }