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

DEPS

 # This file is used to manage the dependencies of the Chromium src repo. It is
 # used by gclient to determine what version of each dependency to check out, and
 # where.
 #
 # For more information, please refer to the official documentation:
 #   https://sites.google.com/a/chromium.org/dev/developers/how-tos/get-the-code
 #
 # When adding a new dependency, please update the top-level .gitignore file
 # to list the dependency's destination directory.
 #
@@ skipping 83 matching lines @@
   # and whatever else without interference from each other.
   'freetype_android_revision': 'c38be52bf8de3b1699d74932b849bf150265819e',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling catapult
   # and whatever else without interference from each other.
   'catapult_revision': '11d3d44fb9d22dea38862472a620d4f0be67ae97',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling libFuzzer
   # and whatever else without interference from each other.
   'libfuzzer_revision': '2ed967ccadb496a1e916d9bd33a41386900dfb6a',
+  # Three lines of non-changing comments so that
+  # the commit queue can handle CLs rolling devtools-node-modules
+  # and whatever else without interference from each other.
+  'devtools_node_modules_revision': '6226d6cd80aaf2e5295ed460cf73ef6a582e4d78',
 }
 
 # Only these hosts are allowed for dependencies in this DEPS file.
 # If you need to add a new host, contact chrome infrastracture team.
 allowed_hosts = [
   'android.googlesource.com',
   'boringssl.googlesource.com',
   'chromium.googlesource.com',
   'pdfium.googlesource.com',
   'skia.googlesource.com',
@@ skipping 303 matching lines @@
     'src/third_party/wayland-protocols/src':
       Var('chromium_git') + '/external/anongit.freedesktop.org/git/wayland/wayland-protocols.git' + '@' + '2e541a36deff5f2e16e25e27f7f93d26822eecc2',
 
     # Wireless Display Software. Used on Chrome OS.
     'src/third_party/wds/src':
       Var('chromium_git') + '/external/github.com/01org/wds' + '@' + 'ac3d8210d95f3000bf5c8e16a79dbbbf22d554a5',
 
     # gRPC, an RPC framework. For Blimp use only.
     'src/third_party/grpc':
       Var('chromium_git') + '/external/github.com/grpc/grpc' + '@' + 'b4cc5fc16c1368149c8a20c51248a18009ff8254',
+
+    # DevTools node modules. Used on Linux buildbots only.
+    'src/third_party/WebKit/Source/devtools/devtools-node-modules':
+      Var('chromium_git') + '/external/github.com/ChromeDevTools/devtools-node-modules' + '@' + Var('devtools_node_modules_revision')
   },
   'android': {
     'src/third_party/android_protobuf/src':
       Var('chromium_git') + '/external/android_protobuf.git' + '@' + '999188d0dc72e97f7fe08bb756958a2cf090f4e7',
 
     'src/third_party/android_tools':
       Var('chromium_git') + '/android_tools.git' + '@' + 'b43a6a289a7588b1769814f04dd6c7d7176974cc',
 
     'src/third_party/apache-mime4j':
       Var('chromium_git') + '/chromium/deps/apache-mime4j.git' + '@' + '28cb1108bff4b6cf0a2e86ff58b3d025934ebe3a',
@@ skipping 617 matching lines @@
                 "-s", "src/v8/test/fuzzer/wasm_asmjs.tar.gz.sha1",
     ],
   },
   {
     'name': 'clang_format_merge_driver',
     'pattern': '.',
     'action': [ 'python',
                 'src/tools/clang_format_merge_driver/install_git_hook.py',
     ],
   },
+  {
+    'name': 'devtools_install_node',
+    'action': [ 'python',
+                'src/third_party/WebKit/Source/devtools/scripts/local_node/node.py',
+                '--running-as-hook',
+                '--version',
+    ],
+  },
 ]
 
 recursedeps = [
   # buildtools provides clang_format, libc++, and libc++abi
   'src/buildtools',
   # android_tools manages the NDK.
   'src/third_party/android_tools',
   # ANGLE manages DEPS that it also owns the build files for, such as dEQP.
   ("src/third_party/angle", "DEPS.chromium"),
 ]