Remove the OnError method from notification delegates.

content/browser/frame_host/render_frame_host_impl.cc

 // Copyright 2013 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 "content/browser/frame_host/render_frame_host_impl.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/containers/hash_tables.h"
 #include "base/lazy_instance.h"
@@ skipping 83 matching lines @@
   void NotificationDisplayed() override {
     RenderFrameHost* rfh =
         RenderFrameHost::FromID(render_process_id_, render_frame_id_);
     if (!rfh)
       return;
 
     rfh->Send(new DesktopNotificationMsg_PostDisplay(
         rfh->GetRoutingID(), notification_id_));
   }
 
-  void NotificationError() override {
-    RenderFrameHost* rfh =
-        RenderFrameHost::FromID(render_process_id_, render_frame_id_);
-    if (!rfh)
-      return;
-
-    rfh->Send(new DesktopNotificationMsg_PostError(
-        rfh->GetRoutingID(), notification_id_));
-  }
-
   void NotificationClosed(bool by_user) override {
     RenderFrameHost* rfh =
         RenderFrameHost::FromID(render_process_id_, render_frame_id_);
     if (!rfh)
       return;
 
     rfh->Send(new DesktopNotificationMsg_PostClose(
         rfh->GetRoutingID(), notification_id_, by_user));
     static_cast<RenderFrameHostImpl*>(rfh)->NotificationClosed(
         notification_id_);
@@ skipping 1534 matching lines @@
 void RenderFrameHostImpl::DidUseGeolocationPermission() {
   RenderFrameHost* top_frame = frame_tree_node()->frame_tree()->GetMainFrame();
   GetContentClient()->browser()->RegisterPermissionUsage(
       PERMISSION_GEOLOCATION,
       delegate_->GetAsWebContents(),
       GetLastCommittedURL().GetOrigin(),
       top_frame->GetLastCommittedURL().GetOrigin());
 }
 
 }  // namespace content