[DevTools] Shows Manifest file in Sources tab

third_party/WebKit/Source/core/loader/DocumentThreadableLoader.cpp

 /*
  * Copyright (C) 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2013, Intel Corporation
  *
  * 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.
@@ skipping 782 matching lines @@
 
         if (m_options.timeoutMilliseconds > 0)
             m_timeoutTimer.startOneShot(m_options.timeoutMilliseconds / 1000.0, BLINK_FROM_HERE);
 
         FetchRequest newRequest(request, m_options.initiator, resourceLoaderOptions);
         if (m_options.crossOriginRequestPolicy == AllowCrossOriginRequests)
             newRequest.setOriginRestriction(FetchRequest::NoOriginRestriction);
         ASSERT(!resource());
         if (request.requestContext() == WebURLRequest::RequestContextVideo || request.requestContext() == WebURLRequest::RequestContextAudio)
             setResource(RawResource::fetchMedia(newRequest, document().fetcher()));
+        else if (request.requestContext() == WebURLRequest::RequestContextManifest)
+            setResource(RawResource::fetchManifest(newRequest, document().fetcher()));
         else
             setResource(RawResource::fetch(newRequest, document().fetcher()));
         if (resource() && resource()->loader()) {
             unsigned long identifier = resource()->identifier();
             InspectorInstrumentation::documentThreadableLoaderStartedLoadingForClient(m_document, identifier, m_client);
         }
         return;
     }
 
     FetchRequest fetchRequest(request, m_options.initiator, resourceLoaderOptions);
@@ skipping 75 matching lines @@
     return m_securityOrigin ? m_securityOrigin.get() : document().securityOrigin();
 }
 
 Document& DocumentThreadableLoader::document() const
 {
     ASSERT(m_document);
     return *m_document;
 }
 
 } // namespace blink