Add eslint and closure compile support for chrome://process-internals.

Bug: 850087
Change-Id: If9f76424b0c2574c67e2a1ed24f3029dfbd798c6
Reviewed-on: https://chromium-review.googlesource.com/c/1268658Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
Commit-Queue: Nasko Oskov <nasko@chromium.org>
Cr-Commit-Position: refs/heads/master@{#599688}

content/browser/resources/BUILD.gn

@@ -8,6 +8,7 @@ if (closure_compile) {
   group("closure_compile") {
     deps = [
       "histograms:closure_compile",
+      "process:closure_compile",
     ]
   }
 }

content/browser/resources/PRESUBMIT.py

+# Copyright 2018 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.
+
+"""Presubmit script for files in content/browser/resources.
+
+See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts
+for more details about the presubmit API built into depot_tools.
+"""
+
+
+def CheckHtml(input_api, output_api):
+  return input_api.canned_checks.CheckLongLines(
+      input_api, output_api, 80, lambda x: x.LocalPath().endswith('.html'))
+
+
+def _CheckWebDevStyle(input_api, output_api):
+  results = []
+
+  try:
+    import sys
+    old_sys_path = sys.path[:]
+    cwd = input_api.PresubmitLocalPath()
+    sys.path += [input_api.os_path.join(cwd, '..', '..', '..', 'tools')]
+    import web_dev_style.presubmit_support
+    results += web_dev_style.presubmit_support.CheckStyle(input_api, output_api)
+  finally:
+    sys.path = old_sys_path
+
+  return results
+
+
+def _CheckChangeOnUploadOrCommit(input_api, output_api):
+  results = []
+  affected = input_api.AffectedFiles()
+  if any(f for f in affected if f.LocalPath().endswith('.html')):
+    results += CheckHtml(input_api, output_api)
+
+  results += _CheckWebDevStyle(input_api, output_api)
+  results += input_api.canned_checks.CheckPatchFormatted(input_api, output_api,
+                                                         check_js=True)
+  return results
+
+
+def CheckChangeOnUpload(input_api, output_api):
+  return _CheckChangeOnUploadOrCommit(input_api, output_api)
+
+
+def CheckChangeOnCommit(input_api, output_api):
+  return _CheckChangeOnUploadOrCommit(input_api, output_api)

content/browser/resources/process/.eslintrc.js

+// Copyright 2018 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.
+
+module.exports = {
+  'env': {
+    'browser': true,
+    'es6': true,
+  },
+  'rules': {
+    'no-var': 'error',
+  },
+};

content/browser/resources/process/BUILD.gn

+# Copyright 2018 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("//third_party/closure_compiler/compile_js.gni")
+
+js_type_check("closure_compile") {
+  deps = [
+    ":process_internals",
+  ]
+}
+
+js_library("process_internals") {
+  deps = [
+    "//ui/webui/resources/js:assert",
+    "//ui/webui/resources/js:util",
+    "//ui/webui/resources/js/cr/ui:tree",
+  ]
+  extra_deps = [
+    "//content/browser/process_internals:mojo_bindings_js",
+    "//url/mojom:url_mojom_gurl_js",
+  ]
+  externs_list = [
+    "$root_gen_dir/content/browser/process_internals/process_internals.mojom.externs.js",
+    "$root_gen_dir/url/mojom/url.mojom.externs.js",
+    "$externs_path/mojo.js",
+  ]
+}

content/browser/resources/process/process_internals.js

@@ -117,7 +117,7 @@ function frameToTreeItem(frame) {
  * Initialize and return a tree item representing the WebContentsInfo object
  * and contains all frames in it as a subtree.
  * @param {mojom.WebContentsInfo} webContents
- * @return {cr.ui.TreeItem}
+ * @return {!cr.ui.TreeItem}
  */
 function webContentsToTreeItem(webContents) {
   let itemLabel = 'WebContents: ';