Stop sniffing 'audio/', 'video/', and 'text/csv' into script.

third_party/WebKit/Source/core/dom/ScriptLoader.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nikolas Zimmermann <zimmermann@kde.org>
  *
  * 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 370 matching lines @@
 
     if (m_isExternalScript) {
         ScriptResource* resource = m_resource ? m_resource.get() : sourceCode.resource();
         if (resource) {
             if (!resource->mimeTypeAllowedByNosniff()) {
                 contextDocument->addConsoleMessage(ConsoleMessage::create(SecurityMessageSource, ErrorMessageLevel, "Refused to execute script from '" + resource->url().elidedString() + "' because its MIME type ('" + resource->httpContentType() + "') is not executable, and strict MIME type checking is enabled."));
                 return false;
             }
 
             String mimetype = resource->httpContentType();
-            if (mimetype.startsWith("image/")) {
+            if (mimetype.startsWith("image/") || mimetype == "text/csv" || mimetype.startsWith("audio/") || mimetype.startsWith("video/")) {
                 contextDocument->addConsoleMessage(ConsoleMessage::create(SecurityMessageSource, ErrorMessageLevel, "Refused to execute script from '" + resource->url().elidedString() + "' because its MIME type ('" + mimetype + "') is not executable."));
-                UseCounter::count(frame, UseCounter::BlockedSniffingImageToScript);
+                if (mimetype.startsWith("image/"))
+                    UseCounter::count(frame, UseCounter::BlockedSniffingImageToScript);
+                else if (mimetype.startsWith("audio/"))
+                    UseCounter::count(frame, UseCounter::BlockedSniffingAudioToScript);
+                else if (mimetype.startsWith("video/"))
+                    UseCounter::count(frame, UseCounter::BlockedSniffingVideoToScript);
+                else if (mimetype == "text/csv")
+                    UseCounter::count(frame, UseCounter::BlockedSniffingCSVToScript);
                 return false;
             }
 
             logScriptMimetype(resource, frame, mimetype);
         }
     }
 
     // FIXME: Can this be moved earlier in the function?
     // Why are we ever attempting to execute scripts without a frame?
     if (!frame)
@@ skipping 117 matching lines @@
     if (isHTMLScriptLoader(element))
         return toHTMLScriptElement(element)->loader();
 
     if (isSVGScriptLoader(element))
         return toSVGScriptElement(element)->loader();
 
     return 0;
 }
 
 } // namespace blink