Add support for disabling CSS Properties at runtime

Tools/DumpRenderTree/chromium/TestRunner/src/WebPreferences.cpp

 /*
  * Copyright (C) 2012 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 64 matching lines @@
     minimumAccelerated2dCanvasSize = 0;
 
     DOMPasteAllowed = true;
     XSSAuditorEnabled = false;
     allowDisplayOfInsecureContent = true;
     allowFileAccessFromFileURLs = true;
     allowRunningOfInsecureContent = true;
     authorAndUserStylesEnabled = true;
     defaultTextEncodingName = WebString::fromUTF8("ISO-8859-1");
     experimentalWebGLEnabled = false;
+    experimentalCSSExclusionsEnabled = true;
     experimentalCSSRegionsEnabled = true;
     experimentalCSSGridLayoutEnabled = false;
     javaEnabled = false;
     javaScriptCanAccessClipboard = true;
     javaScriptCanOpenWindowsAutomatically = true;
     supportsMultipleWindows = true;
     javaScriptEnabled = true;
     loadsImagesAutomatically = true;
     localStorageEnabled = true;
     offlineWebApplicationCacheEnabled = true;
@@ skipping 52 matching lines @@
 
     settings->setDOMPasteAllowed(DOMPasteAllowed);
     settings->setXSSAuditorEnabled(XSSAuditorEnabled);
     settings->setAllowDisplayOfInsecureContent(allowDisplayOfInsecureContent);
     settings->setAllowFileAccessFromFileURLs(allowFileAccessFromFileURLs);
     settings->setAllowRunningOfInsecureContent(allowRunningOfInsecureContent);
     settings->setAuthorAndUserStylesEnabled(authorAndUserStylesEnabled);
     settings->setDefaultTextEncodingName(defaultTextEncodingName);
     settings->setExperimentalWebGLEnabled(experimentalWebGLEnabled);
     WebRuntimeFeatures::enableCSSRegions(experimentalCSSRegionsEnabled);
+    WebRuntimeFeatures::enableCSSExclusions(experimentalCSSExclusionsEnabled);

[abarth-chromium, 2013/04/24 21:02:13]

This isn't really the right place to call these functions.  These are
process-global and immutable.  The WebSettings feature are per-page and mutable.

     settings->setExperimentalCSSGridLayoutEnabled(experimentalCSSGridLayoutEnabled);
     settings->setExperimentalCSSCustomFilterEnabled(cssCustomFilterEnabled);
     settings->setJavaEnabled(javaEnabled);
     settings->setJavaScriptCanAccessClipboard(javaScriptCanAccessClipboard);
     settings->setJavaScriptCanOpenWindowsAutomatically(javaScriptCanOpenWindowsAutomatically);
     settings->setSupportsMultipleWindows(supportsMultipleWindows);
     settings->setJavaScriptEnabled(javaScriptEnabled);
     settings->setLoadsImagesAutomatically(loadsImagesAutomatically);
     settings->setLocalStorageEnabled(localStorageEnabled);
     settings->setOfflineWebApplicationCacheEnabled(offlineWebApplicationCacheEnabled);
@@ skipping 47 matching lines @@
     settings->setPasswordEchoEnabled(false);
     settings->setSmartInsertDeleteEnabled(true);
 #ifdef WIN32
     settings->setSelectTrailingWhitespaceEnabled(true);
 #else
     settings->setSelectTrailingWhitespaceEnabled(false);
 #endif
 }
 
 }