Remove the strict dependency on WebContents for Web Notifications.

chrome/browser/notifications/notification_object_proxy.cc

Index: chrome/browser/notifications/notification_object_proxy.cc
diff --git a/chrome/browser/notifications/notification_object_proxy.cc b/chrome/browser/notifications/notification_object_proxy.cc
index 0c54952553b7b7733b65c37a404d8715376a6d99..c5dab66f001834c57d3ff08ef3ff00ba79afcab5 100644
--- a/chrome/browser/notifications/notification_object_proxy.cc
+++ b/chrome/browser/notifications/notification_object_proxy.cc
@@ -5,18 +5,13 @@
 #include "chrome/browser/notifications/notification_object_proxy.h"
 
 #include "base/guid.h"
-#include "base/strings/stringprintf.h"
 #include "content/public/browser/desktop_notification_delegate.h"
-#include "content/public/browser/render_frame_host.h"
-#include "content/public/browser/render_process_host.h"
-#include "content/public/browser/web_contents.h"
 
 NotificationObjectProxy::NotificationObjectProxy(
     scoped_ptr<content::DesktopNotificationDelegate> delegate)
     : delegate_(delegate.Pass()),
       displayed_(false),
-      id_(base::GenerateGUID()) {
-}
+      id_(base::GenerateGUID()) {}
 
 NotificationObjectProxy::~NotificationObjectProxy() {}