[DevTools] Replace ViewportControl with ListControl.

third_party/WebKit/Source/devtools/front_end/ui/UIUtils.js

Index: third_party/WebKit/Source/devtools/front_end/ui/UIUtils.js
diff --git a/third_party/WebKit/Source/devtools/front_end/ui/UIUtils.js b/third_party/WebKit/Source/devtools/front_end/ui/UIUtils.js
index 3a62614d4739e76dd0048d18c889ffe9fd4d1fb8..4428631b6f38a2f4f8646bdb4a0f1f3f11d966dd 100644
--- a/third_party/WebKit/Source/devtools/front_end/ui/UIUtils.js
+++ b/third_party/WebKit/Source/devtools/front_end/ui/UIUtils.js
@@ -998,14 +998,14 @@ UI.measurePreferredSize = function(element, containerElement) {
   containerElement = containerElement || element.ownerDocument.body;
   containerElement.appendChild(element);
   element.positionAt(0, 0);
-  var result = new Size(element.offsetWidth, element.offsetHeight);
+  var result = element.getBoundingClientRect();
 
   element.positionAt(undefined, undefined);
   if (oldParent)
     oldParent.insertBefore(element, oldNextSibling);
   else
     element.remove();
-  return result;
+  return new Size(result.width, result.height);
 };
 
 /**