Disallow setting invalid values for registered properties via CSSOM

third_party/WebKit/Source/core/html/HTMLMarqueeElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2007, 2010 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 341 matching lines @@
   if (marqueeStyle->getPropertyValue("width") == "auto" &&
       marqueeStyle->getPropertyValue("height") == "auto") {
     metrics.contentHeight = 0;
     metrics.contentWidth = 0;
     metrics.marqueeWidth = 0;
     metrics.marqueeHeight = 0;
     return metrics;
   }
 
   if (isHorizontal()) {
-    m_mover->style()->setProperty("width", "-webkit-max-content", "important",
-                                  ASSERT_NO_EXCEPTION);
+    m_mover->style()->setProperty(nullptr, "width", "-webkit-max-content",
+                                  "important", ASSERT_NO_EXCEPTION);
   } else {
-    m_mover->style()->setProperty("height", "-webkit-max-content", "important",
-                                  ASSERT_NO_EXCEPTION);
+    m_mover->style()->setProperty(nullptr, "height", "-webkit-max-content",
+                                  "important", ASSERT_NO_EXCEPTION);
   }
   CSSStyleDeclaration* moverStyle =
       document().domWindow()->getComputedStyle(m_mover, String());
 
   metrics.contentWidth = moverStyle->getPropertyValue("width").toDouble();
   metrics.contentHeight = moverStyle->getPropertyValue("height").toDouble();
   metrics.marqueeWidth = marqueeStyle->getPropertyValue("width").toDouble();
   metrics.marqueeHeight = marqueeStyle->getPropertyValue("height").toDouble();
 
   if (isHorizontal()) {
-    m_mover->style()->setProperty("width", "", "important",
-                                  ASSERT_NO_EXCEPTION);
+    m_mover->style()->removeProperty("width", ASSERT_NO_EXCEPTION);
   } else {
-    m_mover->style()->setProperty("height", "", "important",
-                                  ASSERT_NO_EXCEPTION);
+    m_mover->style()->removeProperty("height", ASSERT_NO_EXCEPTION);
   }
 
   return metrics;
 }
 
 HTMLMarqueeElement::AnimationParameters
 HTMLMarqueeElement::getAnimationParameters() {
   AnimationParameters parameters;
   Metrics metrics = getMetrics();
 
@@ skipping 99 matching lines @@
          String::numberToStringECMAScript(value) + "px)";
 }
 
 DEFINE_TRACE(HTMLMarqueeElement) {
   visitor->trace(m_mover);
   visitor->trace(m_player);
   HTMLElement::trace(visitor);
 }
 
 }  // namespace blink