Fix double resource request for script resources with integrity attr.

third_party/WebKit/Source/core/fetch/ScriptResource.cpp

 /*
     Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
     Copyright (C) 2001 Dirk Mueller (mueller@kde.org)
     Copyright (C) 2002 Waldo Bastian (bastian@kde.org)
     Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
     Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Library General Public
     License as published by the Free Software Foundation; either
@@ skipping 24 matching lines @@
 #include "platform/SharedBuffer.h"
 #include "platform/network/HTTPParsers.h"
 #include "public/platform/WebProcessMemoryDump.h"
 
 namespace blink {
 
 ResourcePtr<ScriptResource> ScriptResource::fetch(FetchRequest& request, ResourceFetcher* fetcher)
 {
     ASSERT(request.resourceRequest().frameType() == WebURLRequest::FrameTypeNone);
     request.mutableResourceRequest().setRequestContext(WebURLRequest::RequestContextScript);
-    return toScriptResource(fetcher->requestResource(request, ScriptResourceFactory()));
+    ResourcePtr<ScriptResource> resource = toScriptResource(fetcher->requestResource(request, ScriptResourceFactory()));
+    if (resource && !request.integrityMetadata().isEmpty())
+        resource->setIntegrityMetadata(request.integrityMetadata());
+    return resource;
 }
 
 ScriptResource::ScriptResource(const ResourceRequest& resourceRequest, const String& charset)
     : TextResource(resourceRequest, Script, "application/javascript", charset), m_integrityChecked(false)
 {
     DEFINE_STATIC_LOCAL(const AtomicString, acceptScript, ("*/*", AtomicString::ConstructFromLiteral));
 
     // It's javascript we want.
     // But some websites think their scripts are <some wrong mimetype here>
     // and refuse to serve them if we only accept application/x-javascript.
@@ skipping 62 matching lines @@
 
 bool ScriptResource::mustRefetchDueToIntegrityMetadata(const FetchRequest& request) const
 {
     if (request.integrityMetadata().isEmpty())
         return false;
 
     return !IntegrityMetadata::setsEqual(m_integrityMetadata, request.integrityMetadata());
 }
 
 } // namespace blink