DevTools: Add support for installing node and running eslint over devtools.

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 1166 matching lines @@
     "scripts/closure/",
     "scripts/compile_frontend.py",
     "scripts/jsdoc_validator/",
     "//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",
   ]
 }
+
+group("devtools_eslint") {
+  data = [
+    # Needed for isolate script to execute.
+    ".eslintignore",
+    ".eslintrc.js",
+    "devtools-node-modules/",
+    "front_end/",
+    "scripts/buildbot/run_eslint.py",
+    "scripts/local_node/",
+    "//testing/scripts/run_devtools_eslint.py",
+    "//testing/scripts/common.py",
+    "//testing/xvfb.py",
+  ]
+}