[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.");
+TestRunner.addResult("This tests if the SimpleViewport 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 height;
+function createItem(index) {
+  var item = document.createElement("div");
+  item.style.height = height + "px";
+  item.textContent = index;
+  return item;
 }
-var viewport = new UI.ViewportControl({
-    fastItemHeight: i => heights[i],
-    itemCount: _ => items.length,
-    itemElement: i => items[i]
-});
+
+var viewport = new UI.SimpleViewport(createItem);
 viewport.element.style.height = "300px";
 UI.inspectorView.element.appendChild(viewport.element);
 
-viewport.refresh();
-dumpViewport();
-
-viewport.forceScrollItemToBeFirst(26);
+height = 28;
+viewport.refresh(100);
 dumpViewport();
 
 viewport.scrollItemIntoView(33);
 dumpViewport();
 
 viewport.scrollItemIntoView(30);
 dumpViewport();
 
-viewport.forceScrollItemToBeFirst(30);
+viewport.scrollItemIntoView(7);
 dumpViewport();
 
-viewport.forceScrollItemToBeLast(88);
+viewport.scrollItemIntoView(99);
 dumpViewport();
 
-for (var i = 0; i < 100; i++)
-    items[i].style.height = (heights[i] = (i % 2) ? 55 : 63) + "px";
-viewport.refresh();
-viewport.forceScrollItemToBeLast(88);
+viewport.scrollItemIntoView(98);
+dumpViewport();
+
+viewport.scrollItemIntoView(0);
+dumpViewport();
+
+height = 55;
+viewport.resetElementHeight();
+viewport.refresh(100);
+
+viewport.scrollItemIntoView(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("");
+  TestRunner.addResult("First:" + viewport._viewport._firstIndex);
+  TestRunner.addResult("Last:" + viewport._viewport._lastIndex);
+  TestRunner.addResult("ScrollTop:" + viewport.element.scrollTop);
+  TestRunner.addResult("");
 }