DevTools: Introduce Landing page for Timeline panel.

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")
 
 devtools_embedder_scripts = [
   "front_end/devtools_compatibility.js",
@@ skipping 720 matching lines @@
   "front_end/layer_viewer/Layers3DView.js",
   "front_end/layer_viewer/PaintProfilerView.js",
   "front_end/layer_viewer/TransformController.js",
   "front_end/layer_viewer/layerDetailsView.css",
   "front_end/layer_viewer/layers3DView.css",
   "front_end/layer_viewer/paintProfiler.css",
 ]
 devtools_timeline_js_files = [
   "front_end/timeline/invalidationsTree.css",
   "front_end/timeline/timelineFlamechartPopover.css",
+  "front_end/timeline/timelineLandingPage.css",
   "front_end/timeline/timelinePaintProfiler.css",
   "front_end/timeline/timelinePanel.css",
   "front_end/timeline/timelineStatusDialog.css",
   "front_end/timeline/CountersGraph.js",
   "front_end/timeline/MemoryCountersGraph.js",
   "front_end/timeline/TimelineController.js",
   "front_end/timeline/TimelineEventOverview.js",
   "front_end/timeline/TimelineFlameChart.js",
   "front_end/timeline/TimelineFlameChartView.js",
   "front_end/timeline/TimelineNetworkFlameChart.js",
+  "front_end/timeline/TimelineLandingPage.js",
   "front_end/timeline/TimelineLayersView.js",
   "front_end/timeline/TimelineLoader.js",
   "front_end/timeline/TimelinePaintProfilerView.js",
   "front_end/timeline/TimelinePanel.js",
   "front_end/timeline/TimelineTreeView.js",
   "front_end/timeline/TimelineUIUtils.js",
 ]
 devtools_ui_lazy_js_files = [
   "front_end/ui_lazy/dataGrid.css",
   "front_end/ui_lazy/dialog.css",
@@ skipping 415 matching lines @@
     "scripts/compile_frontend.py",
     "scripts/jsdoc_validator/",
     "scripts/utils.py",
     "//testing/scripts/run_devtools_closure_compile.py",
     "//testing/scripts/common.py",
     "//testing/xvfb.py",
     "//third_party/WebKit/Source/core/inspector/browser_protocol.json",
     "//v8/src/inspector/js_protocol.json",
   ]
 }