Refactor notification operation functionality out of PNS

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 15a57b3d0deee3c9a6035cdf937c03d3e87590cd..07fe0e546b5b3d3dd46917e9e9c321682ab345f7 100644
--- a/chrome/browser/notifications/notification_object_proxy.cc
+++ b/chrome/browser/notifications/notification_object_proxy.cc
@@ -8,6 +8,7 @@
 
 #include "base/guid.h"
 #include "base/logging.h"
+#include "chrome/browser/notifications/notification_common.h"
 #include "chrome/browser/notifications/platform_notification_service_impl.h"
 #include "content/public/browser/desktop_notification_delegate.h"
 
@@ -42,13 +43,11 @@ void NotificationObjectProxy::Click() {
 void NotificationObjectProxy::ButtonClick(int button_index) {
   // Notification buttons not are supported for non persistent notifications.
   DCHECK_EQ(button_index, 0);
-  PlatformNotificationServiceImpl::GetInstance()->OpenNotificationSettings(
-      browser_context_);
+  NotificationCommon::OpenNotificationSettings(browser_context_);
 }
 
 void NotificationObjectProxy::SettingsClick() {
-  PlatformNotificationServiceImpl::GetInstance()->OpenNotificationSettings(
-      browser_context_);
+  NotificationCommon::OpenNotificationSettings(browser_context_);
   return;
 }