Reland of [DevTools] Show icon in top toolbar when Node target is available

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 282 matching lines @@
   "front_end/layer_viewer/TransformController.js",
   "front_end/layers/LayerPaintProfilerView.js",
   "front_end/layers/LayersPanel.js",
   "front_end/layers/LayerTreeModel.js",
   "front_end/layers/module.json",
   "front_end/main/errorWarningCounter.css",
   "front_end/main/ExecutionContextSelector.js",
   "front_end/main/GCActionDelegate.js",
   "front_end/main/Main.js",
   "front_end/main/module.json",
+  "front_end/main/nodeIcon.css",
   "front_end/main/remoteDebuggingTerminatedScreen.css",
   "front_end/main/renderingOptions.css",
   "front_end/main/RenderingOptions.js",
   "front_end/main/RequestAppBannerActionDelegate.js",
   "front_end/main/SimpleApp.js",
   "front_end/main/targetCrashedScreen.css",
   "front_end/network/blockedURLsPane.css",
   "front_end/network/BlockedURLsPane.js",
   "front_end/network/eventSourceMessagesView.css",
   "front_end/network/EventSourceMessagesView.js",
@@ skipping 484 matching lines @@
   "front_end/Images/chromeRight.png",
   "front_end/Images/chromeSelect.png",
   "front_end/Images/chromeSelect_2x.png",
   "front_end/Images/deleteIcon.png",
   "front_end/Images/errorWave.png",
   "front_end/Images/errorWave_2x.png",
   "front_end/Images/ic_info_black_18dp.svg",
   "front_end/Images/ic_warning_black_18dp.svg",
   "front_end/Images/navigationControls.png",
   "front_end/Images/navigationControls_2x.png",
+  "front_end/Images/nodeIcon.png",
   "front_end/Images/popoverArrows.png",
   "front_end/Images/profileGroupIcon.png",
   "front_end/Images/profileIcon.png",
   "front_end/Images/profileSmallIcon.png",
   "front_end/Images/radioDot.png",
   "front_end/Images/resizeDiagonal.png",
   "front_end/Images/resizeDiagonal_2x.png",
   "front_end/Images/resizeHorizontal.png",
   "front_end/Images/resizeHorizontal_2x.png",
   "front_end/Images/resizeVertical.png",
@@ skipping 325 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",
   ]
 }