DevTools: bring back old landing page in timeline/performance.

third_party/WebKit/Source/devtools/BUILD.gn

 # 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.
 
 import("//build/config/features.gni")
 import("//third_party/WebKit/public/public_features.gni")
 import("//third_party/WebKit/Source/core/core.gni")
 
 all_devtools_files = [
   "front_end/accessibility/AccessibilityModel.js",
@@ skipping 540 matching lines @@
   "front_end/timeline_model/TracingLayerTree.js",
   "front_end/timeline/CountersGraph.js",
   "front_end/timeline/invalidationsTree.css",
   "front_end/timeline/MemoryCountersGraph.js",
   "front_end/timeline/module.json",
   "front_end/timeline/TimelineController.js",
   "front_end/timeline/TimelineEventOverview.js",
   "front_end/timeline/TimelineFlameChart.js",
   "front_end/timeline/timelineFlamechartPopover.css",
   "front_end/timeline/TimelineFlameChartView.js",
-  "front_end/timeline/timelineLandingPage.css",
-  "front_end/timeline/TimelineLandingPage.js",
   "front_end/timeline/TimelineLayersView.js",
   "front_end/timeline/TimelineLoader.js",
   "front_end/timeline/TimelineNetworkFlameChart.js",
   "front_end/timeline/timelinePaintProfiler.css",
   "front_end/timeline/TimelinePaintProfilerView.js",
   "front_end/timeline/timelinePanel.css",
   "front_end/timeline/TimelinePanel.js",
   "front_end/timeline/timelineStatusDialog.css",
   "front_end/timeline/TimelineTreeView.js",
   "front_end/timeline/TimelineUIUtils.js",
@@ skipping 500 matching lines @@
     ".eslintrc.js",
     "devtools-node-modules/",
     "front_end/",
     "scripts/buildbot/run_eslint.py",
     "scripts/local_node/",
     "//testing/scripts/common.py",
     "//testing/scripts/run_devtools_check.py",
     "//testing/xvfb.py",
   ]
 }