Disallow setting invalid values for registered properties via CSSOM

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

Index: third_party/WebKit/Source/core/html/HTMLMarqueeElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLMarqueeElement.cpp b/third_party/WebKit/Source/core/html/HTMLMarqueeElement.cpp
index 6423c14eb29e627b0dba368792d7644215206fbe..b3911cc1e6cfe84106f9b57f9047de260d4b9bf0 100644
--- a/third_party/WebKit/Source/core/html/HTMLMarqueeElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLMarqueeElement.cpp
@@ -359,11 +359,11 @@ HTMLMarqueeElement::Metrics HTMLMarqueeElement::getMetrics() {
   }
 
   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());
@@ -374,11 +374,9 @@ HTMLMarqueeElement::Metrics HTMLMarqueeElement::getMetrics() {
   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;