Revert of DevTools: Introduce module initializers

Source/devtools/front_end/timeline/_module.js

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-importScript("CountersGraph.js");
-importScript("Layers3DView.js");
-importScript("MemoryCountersGraph.js");
-importScript("TimelineModel.js");
-importScript("TimelineModelImpl.js");
-importScript("TimelineJSProfile.js");
-importScript("TimelineOverviewPane.js");
-importScript("TimelinePresentationModel.js");
-importScript("TracingTimelineModel.js");
-importScript("TimelineFrameModel.js");
-importScript("TimelineEventOverview.js");
-importScript("TimelineFrameOverview.js");
-importScript("TimelineMemoryOverview.js");
-importScript("TimelinePowerGraph.js");
-importScript("TimelinePowerOverview.js");
-importScript("TimelineFlameChart.js");
-importScript("TimelineUIUtils.js");
-importScript("TimelineUIUtilsImpl.js");
-importScript("TimelineView.js");
-importScript("TimelineLayersView.js");
-importScript("TimelinePaintProfilerView.js");
-importScript("TracingModel.js");
-importScript("TracingTimelineUIUtils.js");
-importScript("TransformController.js");
-importScript("PaintProfilerView.js");
-importScript("TimelinePanel.js");