Timeline: quit using Progress, introduce TimelineLifecycleDelegate

third_party/WebKit/LayoutTests/http/tests/inspector/timeline-test.js

 var initialize_Timeline = function() {
 
 InspectorTest.preloadPanel("timeline");
 WebInspector.TempFile = InspectorTest.TempFileMock;
 
 // Scrub values when printing out these properties in the record or data field.
 InspectorTest.timelinePropertyFormatters = {
     children: "formatAsTypeName",
     endTime: "formatAsTypeName",
     requestId: "formatAsTypeName",
@@ skipping 379 matching lines @@
 InspectorTest.loadTimeline = function(timelineData)
 {
     var timeline = WebInspector.panels.timeline;
 
     function createFileReader(file, delegate)
     {
         return new InspectorTest.FakeFileReader(timelineData, delegate, timeline._saveToFile.bind(timeline));
     }
 
     InspectorTest.override(WebInspector.TimelineLoader, "_createFileReader", createFileReader);
-    WebInspector.TimelineLoader.loadFromFile(InspectorTest.timelineModel(), {}, new WebInspector.Progress());
+    timeline._loadFromFile({});
 }
 
 };
 
 function generateFrames(count, callback)
 {
     makeFrame();
     function makeFrame()
     {
         document.body.style.backgroundColor = count & 1 ? "rgb(200, 200, 200)" : "rgb(240, 240, 240)";
         if (!--count) {
             callback();
             return;
         }
         if (window.testRunner)
             testRunner.capturePixelsAsyncThen(requestAnimationFrame.bind(window, makeFrame));
         else
             window.requestAnimationFrame(makeFrame);
     }
 }