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

third_party/WebKit/Source/devtools/BUILD.gn

Index: third_party/WebKit/Source/devtools/BUILD.gn
diff --git a/third_party/WebKit/Source/devtools/BUILD.gn b/third_party/WebKit/Source/devtools/BUILD.gn
index 8981a2af07c17e32ad119ba525ceaaafd184eedd..17380a3bd98f4d40dc07c09e772e085da6d2ad7d 100644
--- a/third_party/WebKit/Source/devtools/BUILD.gn
+++ b/third_party/WebKit/Source/devtools/BUILD.gn
@@ -1184,3 +1184,18 @@ group("devtools_closure_compile") {
     "//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",
+  ]
+}