Remove the unused source_process_id and provider_host arguments to SW unregistration.

content/browser/service_worker/service_worker_dispatcher_host.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/service_worker/service_worker_dispatcher_host.h"
 
 #include "base/logging.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/browser/message_port_message_filter.h"
 #include "content/browser/message_port_service.h"
@@ skipping 166 matching lines @@
   // ChildProcessSecurityImpl. See http://crbug.com/311631.
   if (!context_ || !ServiceWorkerUtils::IsFeatureEnabled()) {
     Send(new ServiceWorkerMsg_ServiceWorkerRegistrationError(
         thread_id,
         request_id,
         blink::WebServiceWorkerError::DisabledError,
         base::ASCIIToUTF16(kDisabledErrorMessage)));
     return;
   }
 
   ServiceWorkerProviderHost* provider_host = context_->GetProviderHost(

[Jeffrey Yasskin, 2014/04/29 00:37:09]

I left this lookup alone because it looks like the beginning of a security
measure, checking that the unregistration came from the right origin.

       render_process_id_, provider_id);
   if (!provider_host) {
     BadMessageReceived();
     return;
   }
 
   context_->UnregisterServiceWorker(
       pattern,
-      render_process_id_,
-      provider_host,
       base::Bind(&ServiceWorkerDispatcherHost::UnregistrationComplete,
                  this,
                  thread_id,
                  request_id));
 }
 
 void ServiceWorkerDispatcherHost::OnPostMessage(
     int handle_id,
     const base::string16& message,
     const std::vector<int>& sent_message_port_ids) {
@@ skipping 168 matching lines @@
     ServiceWorkerStatusCode status) {
   base::string16 error_message;
   blink::WebServiceWorkerError::ErrorType error_type;
   GetServiceWorkerRegistrationStatusResponse(
       status, &error_type, &error_message);
   Send(new ServiceWorkerMsg_ServiceWorkerRegistrationError(
       thread_id, request_id, error_type, error_message));
 }
 
 }  // namespace content