Revert of Revert of DevTools: Introduce module initializers

Source/devtools/front_end/timeline/TimelinePanel.js

Index: Source/devtools/front_end/timeline/TimelinePanel.js
diff --git a/Source/devtools/front_end/timeline/TimelinePanel.js b/Source/devtools/front_end/timeline/TimelinePanel.js
index e21f540a26b4fa0113f6e7b91e8101879a20551b..b4c57d49f0ce8861eb0b4195b6795f67e82185f5 100644
--- a/Source/devtools/front_end/timeline/TimelinePanel.js
+++ b/Source/devtools/front_end/timeline/TimelinePanel.js
@@ -29,32 +29,6 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-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");
-
 /**
  * @constructor
  * @extends {WebInspector.Panel}