[DevTools] Replace ViewportControl with ListControl.

third_party/WebKit/LayoutTests/http/tests/inspector-unit/viewport-control.js

-TestRunner.addResult("This tests if the ViewportControl works properly.");
-
-var items = [];
-var heights = [];
-for (var i = 0; i < 100; i++){
-    items[i] = document.createElement("div");
-    items[i].style.height = (heights[i] = (i % 4) ? 50 : 28) + "px";
-    items[i].textContent = i;
-}
-var viewport = new UI.ViewportControl({
-    fastItemHeight: i => heights[i],
-    itemCount: _ => items.length,
-    itemElement: i => items[i]
-});
-viewport.element.style.height = "300px";
-UI.inspectorView.element.appendChild(viewport.element);
-
-viewport.refresh();
-dumpViewport();
-
-viewport.forceScrollItemToBeFirst(26);
-dumpViewport();
-
-viewport.scrollItemIntoView(33);
-dumpViewport();
-
-viewport.scrollItemIntoView(30);
-dumpViewport();
-
-viewport.forceScrollItemToBeFirst(30);
-dumpViewport();
-
-viewport.forceScrollItemToBeLast(88);
-dumpViewport();
-
-for (var i = 0; i < 100; i++)
-    items[i].style.height = (heights[i] = (i % 2) ? 55 : 63) + "px";
-viewport.refresh();
-viewport.forceScrollItemToBeLast(88);
-dumpViewport();
-
-TestRunner.completeTest();
-
-function dumpViewport()
-{
-    TestRunner.addResult("First:" + viewport.firstVisibleIndex());
-    TestRunner.addResult("Last:" + viewport.lastVisibleIndex());
-    TestRunner.addResult("Active Items:" + viewport._innerElement.children.length);
-    TestRunner.addResult("");
-}