Enable SRI only for same origin and CORS content.

Source/core/fetch/Resource.h

 /*
     Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
     Copyright (C) 2001 Dirk Mueller <mueller@kde.org>
     Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
     Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 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
     version 2 of the License, or (at your option) any later version.
@@ skipping 158 matching lines @@
             && type() != Raw
             && type() != TextTrack;
     }
 
     // Computes the status of an object after loading.
     // Updates the expire date on the cache entry file
     void setLoadFinishTime(double finishTime) { m_loadFinishTime = finishTime; }
     void finish();
 
     // FIXME: Remove the stringless variant once all the callsites' error messages are updated.
-    bool passesAccessControlCheck(ExecutionContext*, SecurityOrigin*);
-    bool passesAccessControlCheck(ExecutionContext*, SecurityOrigin*, String& errorDescription);
+    bool passesAccessControlCheck(ExecutionContext*, SecurityOrigin*) const;
+    bool passesAccessControlCheck(ExecutionContext*, SecurityOrigin*, String& errorDescription) const;
+
+    bool isEligibleForIntegrityCheck(ExecutionContext*) const;
 
     void clearLoader();
 
     SharedBuffer* resourceBuffer() const { return m_data.get(); }
     void setResourceBuffer(PassRefPtr<SharedBuffer>);
 
     virtual void willFollowRedirect(ResourceRequest&, const ResourceResponse&);
 
     virtual void updateRequest(const ResourceRequest&) { }
     virtual void responseReceived(const ResourceResponse&, PassOwnPtr<WebDataConsumerHandle>);
@@ skipping 223 matching lines @@
 const char* ResourceTypeName(Resource::Type);
 #endif
 
 #define DEFINE_RESOURCE_TYPE_CASTS(typeName) \
     DEFINE_TYPE_CASTS(typeName##Resource, Resource, resource, resource->type() == Resource::typeName, resource.type() == Resource::typeName); \
     inline typeName##Resource* to##typeName##Resource(const ResourcePtr<Resource>& ptr) { return to##typeName##Resource(ptr.get()); }
 
 }
 
 #endif