[ServiceWorker] Set FetchRequestMode and handle wasFetchedViaServiceWorker.

Source/core/loader/PingLoader.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 128 matching lines @@
 
     TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "ResourceSendRequest", "data", InspectorSendRequestEvent::data(m_identifier, frame, request));
     TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline.stack"), "CallStack", "stack", InspectorCallStackEvent::currentCallStack());
     // FIXME(361045): remove InspectorInstrumentation calls once DevTools Timeline migrates to tracing.
     InspectorInstrumentation::willSendRequest(frame, m_identifier, frame->loader().documentLoader(), request, ResourceResponse(), initiatorInfo);
 
     m_loader = adoptPtr(blink::Platform::current()->createURLLoader());
     ASSERT(m_loader);
     blink::WrappedResourceRequest wrappedRequest(request);
     wrappedRequest.setAllowStoredCredentials(credentialsAllowed == AllowStoredCredentials);
+    wrappedRequest.setFetchCredentialsMode(credentialsAllowed == AllowStoredCredentials ? WebURLRequest::FetchCredentialsModeInclude : WebURLRequest::FetchCredentialsModeSameOrigin);

[yhirano, 2014/10/07 08:03:15]

Can you tell me why same-origin is indicated when credentialsAllowed !=
AllowStoredCredentials?

     m_loader->loadAsynchronously(wrappedRequest, this);
 
     // If the server never responds, FrameLoader won't be able to cancel this load and
     // we'll sit here waiting forever. Set a very generous timeout, just in case.
     m_timeout.startOneShot(60000, FROM_HERE);
 }
 
 PingLoader::~PingLoader()
 {
     if (m_loader)
@@ skipping 49 matching lines @@
 
 void PingLoader::didFailLoading(Page* page)
 {
     LocalFrame* frame = page->deprecatedLocalMainFrame();
     InspectorInstrumentation::didFailLoading(frame, m_identifier, ResourceError::cancelledError(m_url));
     // Notification to FrameConsole should come AFTER Resource Agent notification, front-end relies on this.
     frame->console().didFailLoading(m_identifier, ResourceError::cancelledError(m_url));
 }
 
 }