WebUI Polymer3: Auto-generate js_library() targets for third_party/polymer/v3_0/.

Specifically:
 - Update v1_0/generate_gn.sh to expect a Polymer version number.
 - Update v1_0/reproduce.sh and v3_0/reproduce.sh to pass a version.
 - Add a new tools/polymer/generate_gn_v3.py, which uses acorn to parse
   a JS file and extract JS imports.
 - Update third_party/polymer/v3_0/package.json to list acorn as
   devDependencies (and move rollup to devDependencies as well).

These files are necessary to type-check WebUI code that uses Polymer3.

Bug: 970885
Change-Id: Iae3e3e2afdb58056af6ac944a7bc4b88e87108c3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1717524
Commit-Queue: Demetrios Papadopoulos <dpapad@chromium.org>
Reviewed-by: Rebekah Potter <rbpotter@chromium.org>
Cr-Commit-Position: refs/heads/master@{#682362}

third_party/polymer/v1_0/generate_gn.sh

@@ -6,13 +6,26 @@
 dirs=$(find components-chromium -type d | grep -v 'components-chromium/polymer')
 
 gn_files=''
+polymer_version=$1
+
+if [ "$polymer_version" -eq 3 ];
+  then
+    file_extension="js";
+  else
+    file_extension="html";
+fi
 
 for dir in $dirs; do
-  htmls=$(\ls $dir/*.html 2>/dev/null)
-  if [ "$htmls" ]; then
+  files=$(\ls $dir/*.$file_extension 2>/dev/null)
+  if [ "$files" ]; then
     echo "Analyzing $dir"
     gn_file="$dir/BUILD.gn"
-    content=$(../../../tools/polymer/generate_gn.py $htmls)
+    if [ "$polymer_version" -eq 3 ];
+      then
+        content=$(../../../tools/polymer/generate_gn_v3.py $files);
+      else
+        content=$(../../../tools/polymer/generate_gn.py $files);
+    fi
     if [ "$content" ]; then
       echo "Writing $gn_file"
       echo "$content" > "$gn_file"
@@ -25,4 +38,12 @@ for dir in $dirs; do
   fi
 done
 
+# Copy components-chromium/polymer BUILD.gn file manually, since it is not
+# auto-generated by generate_gn_v3.py.
+if [ "$polymer_version" -eq 3 ];
+  then
+    cp ./BUILD_polymer.gn "components-chromium/polymer/BUILD.gn"
+fi
+
+
 git cl format $gn_files

third_party/polymer/v1_0/reproduce.sh

@@ -108,7 +108,7 @@ echo 'Creating a summary of components...'
 python create_components_summary.py > components_summary.txt
 
 echo 'Creating GN files for interfaces and externs...'
-./generate_gn.sh
+./generate_gn.sh 2 # polymer_version=2
 
 popd > /dev/null
 

third_party/polymer/v3_0/BUILD_polymer.gn

+# Copyright 2019 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_library("polymer_bundled") {
+  externs_list = [
+    "./externs/closure-types.js",
+    "./externs/polymer-dom-api-externs.js",
+    "./externs/polymer-externs.js",
+    "./externs/shadycss-externs.js",
+    "./externs/webcomponents-externs.js",
+  ]
+}

third_party/polymer/v3_0/components-chromium/font-roboto/BUILD.gn

+# Copyright 2019 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.
+#
+# NOTE: Created with generate_gn_v3.py, please do not edit.
+
+import("//third_party/closure_compiler/compile_js.gni")
+
+js_library("roboto") {
+}

third_party/polymer/v3_0/components-chromium/iron-a11y-announcer/BUILD.gn

+# Copyright 2019 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.
+#
+# NOTE: Created with generate_gn_v3.py, please do not edit.
+
+import("//third_party/closure_compiler/compile_js.gni")
+
+js_library("iron-a11y-announcer") {
+  deps = [
+    "../polymer:polymer_bundled",
+  ]
+}

third_party/polymer/v3_0/components-chromium/iron-a11y-keys-behavior/BUILD.gn

+# Copyright 2019 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.
+#
+# NOTE: Created with generate_gn_v3.py, please do not edit.
+
+import("//third_party/closure_compiler/compile_js.gni")
+
+js_library("iron-a11y-keys-behavior") {
+  deps = [
+    "../polymer:polymer_bundled",
+  ]
+}

third_party/polymer/v3_0/components-chromium/iron-a11y-keys/BUILD.gn

+# Copyright 2019 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.
+#
+# NOTE: Created with generate_gn_v3.py, please do not edit.
+
+import("//third_party/closure_compiler/compile_js.gni")
+
+js_library("iron-a11y-keys") {
+  deps = [
+    "../iron-a11y-keys-behavior:iron-a11y-keys-behavior",
+    "../polymer:polymer_bundled",
+  ]
+}

third_party/polymer/v3_0/components-chromium/iron-behaviors/BUILD.gn

+# Copyright 2019 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.
+#
+# NOTE: Created with generate_gn_v3.py, please do not edit.
+
+import("//third_party/closure_compiler/compile_js.gni")
+
+js_library("iron-button-state") {
+  deps = [
+    ".:iron-control-state",
+    "../iron-a11y-keys-behavior:iron-a11y-keys-behavior",
+    "../polymer:polymer_bundled",
+  ]
+}
+
+js_library("iron-control-state") {
+  deps = [
+    "../polymer:polymer_bundled",
+  ]
+}

third_party/polymer/v3_0/components-chromium/iron-collapse/BUILD.gn

+# Copyright 2019 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.
+#
+# NOTE: Created with generate_gn_v3.py, please do not edit.
+
+import("//third_party/closure_compiler/compile_js.gni")
+
+js_library("iron-collapse") {
+  deps = [
+    "../iron-resizable-behavior:iron-resizable-behavior",
+    "../polymer:polymer_bundled",
+  ]
+}

third_party/polymer/v3_0/components-chromium/iron-dropdown/BUILD.gn

+# Copyright 2019 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.
+#
+# NOTE: Created with generate_gn_v3.py, please do not edit.
+
+import("//third_party/closure_compiler/compile_js.gni")
+
+js_library("iron-dropdown") {
+  deps = [
+    "../iron-a11y-keys-behavior:iron-a11y-keys-behavior",
+    "../iron-behaviors:iron-control-state",
+    "../iron-overlay-behavior:iron-overlay-behavior",
+    "../neon-animation:neon-animation-runner-behavior",
+    "../polymer:polymer_bundled",
+  ]
+}
+
+js_library("iron-dropdown-scroll-manager") {
+  deps = [
+    "../iron-overlay-behavior:iron-scroll-manager",
+  ]
+}

third_party/polymer/v3_0/components-chromium/iron-fit-behavior/BUILD.gn

+# Copyright 2019 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.
+#
+# NOTE: Created with generate_gn_v3.py, please do not edit.
+
+import("//third_party/closure_compiler/compile_js.gni")
+
+js_library("iron-fit-behavior") {
+  deps = [
+    "../polymer:polymer_bundled",
+  ]
+}

third_party/polymer/v3_0/components-chromium/iron-flex-layout/BUILD.gn

+# Copyright 2019 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.
+#
+# NOTE: Created with generate_gn_v3.py, please do not edit.
+
+import("//third_party/closure_compiler/compile_js.gni")
+
+js_library("iron-flex-layout") {
+  deps = [
+    "../polymer:polymer_bundled",
+  ]
+}
+
+js_library("iron-flex-layout-classes") {
+  deps = [
+    "../polymer:polymer_bundled",
+  ]
+}

third_party/polymer/v3_0/components-chromium/iron-icon/BUILD.gn

+# Copyright 2019 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.
+#
+# NOTE: Created with generate_gn_v3.py, please do not edit.
+
+import("//third_party/closure_compiler/compile_js.gni")
+
+js_library("iron-icon") {
+  deps = [
+    "../iron-flex-layout:iron-flex-layout",
+    "../iron-meta:iron-meta",
+    "../polymer:polymer_bundled",
+  ]
+}

third_party/polymer/v3_0/components-chromium/iron-iconset-svg/BUILD.gn

+# Copyright 2019 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.
+#
+# NOTE: Created with generate_gn_v3.py, please do not edit.
+
+import("//third_party/closure_compiler/compile_js.gni")
+
+js_library("iron-iconset-svg") {
+  deps = [
+    "../iron-meta:iron-meta",
+    "../polymer:polymer_bundled",
+  ]
+}

third_party/polymer/v3_0/components-chromium/iron-input/BUILD.gn

+# Copyright 2019 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.
+#
+# NOTE: Created with generate_gn_v3.py, please do not edit.
+
+import("//third_party/closure_compiler/compile_js.gni")
+
+js_library("iron-input") {
+  deps = [
+    "../iron-a11y-announcer:iron-a11y-announcer",
+    "../iron-validatable-behavior:iron-validatable-behavior",
+    "../polymer:polymer_bundled",
+  ]
+}

third_party/polymer/v3_0/components-chromium/iron-list/BUILD.gn

+# Copyright 2019 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.
+#
+# NOTE: Created with generate_gn_v3.py, please do not edit.
+
+import("//third_party/closure_compiler/compile_js.gni")
+
+js_library("iron-list") {
+  deps = [
+    "../iron-a11y-keys-behavior:iron-a11y-keys-behavior",
+    "../iron-resizable-behavior:iron-resizable-behavior",
+    "../iron-scroll-target-behavior:iron-scroll-target-behavior",
+    "../polymer:polymer_bundled",
+  ]
+}

third_party/polymer/v3_0/components-chromium/iron-location/BUILD.gn

+# Copyright 2019 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.
+#
+# NOTE: Created with generate_gn_v3.py, please do not edit.
+
+import("//third_party/closure_compiler/compile_js.gni")
+
+js_library("iron-location") {
+  deps = [
+    "../polymer:polymer_bundled",
+  ]
+}
+
+js_library("iron-query-params") {
+  deps = [
+    "../polymer:polymer_bundled",
+  ]
+}

third_party/polymer/v3_0/components-chromium/iron-media-query/BUILD.gn

+# Copyright 2019 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.
+#
+# NOTE: Created with generate_gn_v3.py, please do not edit.
+
+import("//third_party/closure_compiler/compile_js.gni")
+
+js_library("iron-media-query") {
+  deps = [
+    "../polymer:polymer_bundled",
+  ]
+}

third_party/polymer/v3_0/components-chromium/iron-meta/BUILD.gn

+# Copyright 2019 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.
+#
+# NOTE: Created with generate_gn_v3.py, please do not edit.
+
+import("//third_party/closure_compiler/compile_js.gni")
+
+js_library("iron-meta") {
+  deps = [
+    "../polymer:polymer_bundled",
+  ]
+}

third_party/polymer/v3_0/components-chromium/iron-overlay-behavior/BUILD.gn

+# Copyright 2019 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.
+#
+# NOTE: Created with generate_gn_v3.py, please do not edit.
+
+import("//third_party/closure_compiler/compile_js.gni")
+
+js_library("iron-focusables-helper") {
+  deps = [
+    "../polymer:polymer_bundled",
+  ]
+}
+
+js_library("iron-overlay-backdrop") {
+  deps = [
+    "../polymer:polymer_bundled",
+  ]
+}
+
+js_library("iron-overlay-behavior") {
+  deps = [
+    ".:iron-focusables-helper",
+    ".:iron-overlay-manager",
+    ".:iron-scroll-manager",
+    "../iron-fit-behavior:iron-fit-behavior",
+    "../iron-resizable-behavior:iron-resizable-behavior",
+    "../polymer:polymer_bundled",
+  ]
+}
+
+js_library("iron-overlay-manager") {
+  deps = [
+    ".:iron-overlay-backdrop",
+    "../iron-a11y-keys-behavior:iron-a11y-keys-behavior",
+    "../polymer:polymer_bundled",
+  ]
+}
+
+js_library("iron-scroll-manager") {
+  deps = [
+    "../polymer:polymer_bundled",
+  ]
+}

third_party/polymer/v3_0/components-chromium/iron-pages/BUILD.gn

+# Copyright 2019 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.
+#
+# NOTE: Created with generate_gn_v3.py, please do not edit.
+
+import("//third_party/closure_compiler/compile_js.gni")
+
+js_library("iron-pages") {
+  deps = [
+    "../iron-resizable-behavior:iron-resizable-behavior",
+    "../iron-selector:iron-selectable",
+    "../polymer:polymer_bundled",
+  ]
+}

third_party/polymer/v3_0/components-chromium/iron-range-behavior/BUILD.gn

+# Copyright 2019 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.
+#
+# NOTE: Created with generate_gn_v3.py, please do not edit.
+
+import("//third_party/closure_compiler/compile_js.gni")
+
+js_library("iron-range-behavior") {
+  deps = [
+    "../polymer:polymer_bundled",
+  ]
+}

third_party/polymer/v3_0/components-chromium/iron-resizable-behavior/BUILD.gn

+# Copyright 2019 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.
+#
+# NOTE: Created with generate_gn_v3.py, please do not edit.
+
+import("//third_party/closure_compiler/compile_js.gni")
+
+js_library("iron-resizable-behavior") {
+  deps = [
+    "../polymer:polymer_bundled",
+  ]
+}

third_party/polymer/v3_0/components-chromium/iron-scroll-target-behavior/BUILD.gn

+# Copyright 2019 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.
+#
+# NOTE: Created with generate_gn_v3.py, please do not edit.
+
+import("//third_party/closure_compiler/compile_js.gni")
+
+js_library("iron-scroll-target-behavior") {
+  deps = [
+    "../polymer:polymer_bundled",
+  ]
+}

third_party/polymer/v3_0/components-chromium/iron-scroll-threshold/BUILD.gn

+# Copyright 2019 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.
+#
+# NOTE: Created with generate_gn_v3.py, please do not edit.
+
+import("//third_party/closure_compiler/compile_js.gni")
+
+js_library("iron-scroll-threshold") {
+  deps = [
+    "../iron-scroll-target-behavior:iron-scroll-target-behavior",
+    "../polymer:polymer_bundled",
+  ]
+}

third_party/polymer/v3_0/components-chromium/iron-selector/BUILD.gn

+# Copyright 2019 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.
+#
+# NOTE: Created with generate_gn_v3.py, please do not edit.
+
+import("//third_party/closure_compiler/compile_js.gni")
+
+js_library("iron-multi-selectable") {
+  deps = [
+    ".:iron-selectable",
+    "../polymer:polymer_bundled",
+  ]
+}
+
+js_library("iron-selectable") {
+  deps = [
+    ".:iron-selection",
+    "../polymer:polymer_bundled",
+  ]
+}
+
+js_library("iron-selection") {
+  deps = [
+    "../polymer:polymer_bundled",
+  ]
+}
+
+js_library("iron-selector") {
+  deps = [
+    ".:iron-multi-selectable",
+    "../polymer:polymer_bundled",
+  ]
+}

third_party/polymer/v3_0/components-chromium/iron-test-helpers/BUILD.gn

+# Copyright 2019 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.
+#
+# NOTE: Created with generate_gn_v3.py, please do not edit.
+
+import("//third_party/closure_compiler/compile_js.gni")
+
+js_library("mock-interactions") {
+  deps = [
+    "../polymer:polymer_bundled",
+  ]
+}

third_party/polymer/v3_0/components-chromium/iron-validatable-behavior/BUILD.gn

+# Copyright 2019 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.
+#
+# NOTE: Created with generate_gn_v3.py, please do not edit.
+
+import("//third_party/closure_compiler/compile_js.gni")
+
+js_library("iron-validatable-behavior") {
+  deps = [
+    "../iron-meta:iron-meta",
+    "../polymer:polymer_bundled",
+  ]
+}

third_party/polymer/v3_0/components-chromium/neon-animation/BUILD.gn

+# Copyright 2019 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.
+#
+# NOTE: Created with generate_gn_v3.py, please do not edit.
+
+import("//third_party/closure_compiler/compile_js.gni")
+
+js_library("neon-animatable") {
+  deps = [
+    ".:neon-animatable-behavior",
+    "../iron-resizable-behavior:iron-resizable-behavior",
+    "../polymer:polymer_bundled",
+  ]
+}
+
+js_library("neon-animatable-behavior") {
+  deps = [
+    "../polymer:polymer_bundled",
+  ]
+}
+
+js_library("neon-animated-pages") {
+  deps = [
+    ".:neon-animation-runner-behavior",
+    "../iron-resizable-behavior:iron-resizable-behavior",
+    "../iron-selector:iron-selectable",
+    "../polymer:polymer_bundled",
+  ]
+}
+
+js_library("neon-animation-behavior") {
+  deps = [
+    "../polymer:polymer_bundled",
+  ]
+}
+
+js_library("neon-animation-runner-behavior") {
+  deps = [
+    ".:neon-animatable-behavior",
+    "../polymer:polymer_bundled",
+  ]
+}

third_party/polymer/v3_0/components-chromium/neon-animation/animations/BUILD.gn

+# Copyright 2019 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.
+#
+# NOTE: Created with generate_gn_v3.py, please do not edit.
+
+import("//third_party/closure_compiler/compile_js.gni")
+
+js_library("fade-in-animation") {
+  deps = [
+    "..:neon-animation-behavior",
+    "../../polymer:polymer_bundled",
+  ]
+}
+
+js_library("fade-out-animation") {
+  deps = [
+    "..:neon-animation-behavior",
+    "../../polymer:polymer_bundled",
+  ]
+}

third_party/polymer/v3_0/components-chromium/paper-behaviors/BUILD.gn

+# Copyright 2019 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.
+#
+# NOTE: Created with generate_gn_v3.py, please do not edit.
+
+import("//third_party/closure_compiler/compile_js.gni")
+
+js_library("paper-inky-focus-behavior") {
+  deps = [
+    ".:paper-ripple-behavior",
+    "../iron-behaviors:iron-button-state",
+    "../iron-behaviors:iron-control-state",
+    "../polymer:polymer_bundled",
+  ]
+}
+
+js_library("paper-ripple-behavior") {
+  deps = [
+    "../iron-behaviors:iron-button-state",
+    "../paper-ripple:paper-ripple",
+    "../polymer:polymer_bundled",
+  ]
+}

third_party/polymer/v3_0/components-chromium/paper-input/BUILD.gn

+# Copyright 2019 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.
+#
+# NOTE: Created with generate_gn_v3.py, please do not edit.
+
+import("//third_party/closure_compiler/compile_js.gni")
+
+js_library("paper-input-addon-behavior") {
+  deps = [
+    "../polymer:polymer_bundled",
+  ]
+}
+
+js_library("paper-input-container") {
+  deps = [
+    "../iron-flex-layout:iron-flex-layout",
+    "../paper-styles:default-theme",
+    "../paper-styles:typography",
+    "../polymer:polymer_bundled",
+  ]
+}
+
+js_library("paper-input-error") {
+  deps = [
+    ".:paper-input-addon-behavior",
+    "../paper-styles:default-theme",
+    "../paper-styles:typography",
+    "../polymer:polymer_bundled",
+  ]
+}

third_party/polymer/v3_0/components-chromium/paper-progress/BUILD.gn

+# Copyright 2019 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.
+#
+# NOTE: Created with generate_gn_v3.py, please do not edit.
+
+import("//third_party/closure_compiler/compile_js.gni")
+
+js_library("paper-progress") {
+  deps = [
+    "../iron-flex-layout:iron-flex-layout",
+    "../iron-range-behavior:iron-range-behavior",
+    "../paper-styles:color",
+    "../polymer:polymer_bundled",
+  ]
+}

third_party/polymer/v3_0/components-chromium/paper-ripple/BUILD.gn

+# Copyright 2019 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.
+#
+# NOTE: Created with generate_gn_v3.py, please do not edit.
+
+import("//third_party/closure_compiler/compile_js.gni")
+
+js_library("paper-ripple") {
+  deps = [
+    "../iron-a11y-keys-behavior:iron-a11y-keys-behavior",
+    "../polymer:polymer_bundled",
+  ]
+}

third_party/polymer/v3_0/components-chromium/paper-spinner/BUILD.gn

+# Copyright 2019 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.
+#
+# NOTE: Created with generate_gn_v3.py, please do not edit.
+
+import("//third_party/closure_compiler/compile_js.gni")
+
+js_library("paper-spinner-behavior") {
+  deps = [
+    "../polymer:polymer_bundled",
+  ]
+}
+
+js_library("paper-spinner-lite") {
+  deps = [
+    ".:paper-spinner-behavior",
+    ".:paper-spinner-styles",
+    "../paper-styles:color",
+    "../polymer:polymer_bundled",
+  ]
+}
+
+js_library("paper-spinner-styles") {
+}

third_party/polymer/v3_0/components-chromium/paper-styles/BUILD.gn

+# Copyright 2019 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.
+#
+# NOTE: Created with generate_gn_v3.py, please do not edit.
+
+import("//third_party/closure_compiler/compile_js.gni")
+
+js_library("color") {
+  deps = [
+    "../polymer:polymer_bundled",
+  ]
+}
+
+js_library("default-theme") {
+  deps = [
+    ".:color",
+    "../polymer:polymer_bundled",
+  ]
+}
+
+js_library("demo-pages") {
+  deps = [
+    ".:color",
+    ".:shadow",
+    ".:typography",
+    "../iron-flex-layout:iron-flex-layout",
+    "../polymer:polymer_bundled",
+  ]
+}
+
+js_library("shadow") {
+  deps = [
+    "../polymer:polymer_bundled",
+  ]
+}
+
+js_library("typography") {
+  deps = [
+    "../font-roboto:roboto",
+    "../polymer:polymer_bundled",
+  ]
+}

third_party/polymer/v3_0/components-chromium/paper-styles/classes/BUILD.gn

+# Copyright 2019 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.
+#
+# NOTE: Created with generate_gn_v3.py, please do not edit.
+
+import("//third_party/closure_compiler/compile_js.gni")
+
+js_library("global") {
+  deps = [
+    "..:paper-styles-classes",
+    "../../polymer:polymer_bundled",
+  ]
+}
+
+js_library("shadow") {
+  deps = [
+    "../../polymer:polymer_bundled",
+  ]
+}
+
+js_library("typography") {
+  deps = [
+    "../../font-roboto:roboto",
+    "../../polymer:polymer_bundled",
+  ]
+}

third_party/polymer/v3_0/components-chromium/paper-styles/element-styles/BUILD.gn

+# Copyright 2019 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.
+#
+# NOTE: Created with generate_gn_v3.py, please do not edit.
+
+import("//third_party/closure_compiler/compile_js.gni")
+
+js_library("paper-item-styles") {
+  deps = [
+    "..:color",
+    "..:default-theme",
+    "..:typography",
+    "../../polymer:polymer_bundled",
+  ]
+}
+
+js_library("paper-material-styles") {
+  deps = [
+    "..:shadow",
+    "../../polymer:polymer_bundled",
+  ]
+}

third_party/polymer/v3_0/components-chromium/paper-tooltip/BUILD.gn

+# Copyright 2019 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.
+#
+# NOTE: Created with generate_gn_v3.py, please do not edit.
+
+import("//third_party/closure_compiler/compile_js.gni")
+
+js_library("paper-tooltip") {
+  deps = [
+    "../polymer:polymer_bundled",
+  ]
+}

third_party/polymer/v3_0/components-chromium/polymer/BUILD.gn

+# Copyright 2019 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_library("polymer_bundled") {
+  externs_list = [
+    "./externs/closure-types.js",
+    "./externs/polymer-dom-api-externs.js",
+    "./externs/polymer-externs.js",
+    "./externs/shadycss-externs.js",
+    "./externs/webcomponents-externs.js",
+  ]
+}

third_party/polymer/v3_0/package-lock.json

@@ -345,12 +345,14 @@
     "@types/estree": {
       "version": "0.0.39",
       "resolved": "https://registry.npmjs.org/@types/estree/-/estree-0.0.39.tgz",
-      "integrity": "sha512-EYNwp3bU+98cpU4lAWYYL7Zz+2gryWH1qbdDTidVd6hkiR6weksdbMadyXKXNPEkQFhXM+hVO9ZygomHXp+AIw=="
+      "integrity": "sha512-EYNwp3bU+98cpU4lAWYYL7Zz+2gryWH1qbdDTidVd6hkiR6weksdbMadyXKXNPEkQFhXM+hVO9ZygomHXp+AIw==",
+      "dev": true
     },
     "@types/node": {
       "version": "12.0.3",
       "resolved": "https://registry.npmjs.org/@types/node/-/node-12.0.3.tgz",
-      "integrity": "sha512-zkOxCS/fA+3SsdA+9Yun0iANxzhQRiNwTvJSr6N95JhuJ/x27z9G2URx1Jpt3zYFfCGUXZGL5UDxt5eyLE7wgw=="
+      "integrity": "sha512-zkOxCS/fA+3SsdA+9Yun0iANxzhQRiNwTvJSr6N95JhuJ/x27z9G2URx1Jpt3zYFfCGUXZGL5UDxt5eyLE7wgw==",
+      "dev": true
     },
     "@webcomponents/shadycss": {
       "version": "1.9.1",
@@ -360,12 +362,14 @@
     "acorn": {
       "version": "6.1.1",
       "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.1.1.tgz",
-      "integrity": "sha512-jPTiwtOxaHNaAPg/dmrJ/beuzLRnXtB0kQPQ8JpotKJgTB6rX6c8mlf315941pyjBSaPg8NHXS9fhP4u17DpGA=="
+      "integrity": "sha512-jPTiwtOxaHNaAPg/dmrJ/beuzLRnXtB0kQPQ8JpotKJgTB6rX6c8mlf315941pyjBSaPg8NHXS9fhP4u17DpGA==",
+      "dev": true
     },
     "rollup": {
       "version": "1.12.4",
       "resolved": "https://registry.npmjs.org/rollup/-/rollup-1.12.4.tgz",
       "integrity": "sha512-sHg0F05oTMJzM592MWU8irsPx8LIFMKSCnEkcp6vp/gnj+oJ9GJEBW9hl8jUqy2L6Q2uUxFzPgvoExLbfuSODA==",
+      "dev": true,
       "requires": {
         "@types/estree": "0.0.39",
         "@types/node": "^12.0.2",

third_party/polymer/v3_0/package.json

@@ -37,7 +37,10 @@
     "@polymer/paper-styles": "3.0.1",
     "@polymer/paper-tooltip": "3.0.1",
     "@polymer/polymer": "3.2.0",
-    "@webcomponents/shadycss": "1.9.1",
+    "@webcomponents/shadycss": "1.9.1"
+  },
+  "devDependencies": {
+    "acorn": "6.1.1",
     "rollup": "1.12.4"
   }
 }

third_party/polymer/v3_0/reproduce.sh

@@ -26,7 +26,9 @@ pushd "$(dirname "$0")" > /dev/null
 
 rm -rf node_modules
 
-npm install --production
+# Note: The --production flag is omitted, such that devDependencies
+# referenced later by this script are also downloaded.
+npm install
 
 rsync -c --delete --delete-excluded -r -v --prune-empty-dirs \
     --exclude-from="rsync_exclude.txt" \
@@ -90,5 +92,8 @@ python ../v1_0/rgbify_hex_vars.py --filter-prefix=google --replace \
     components-chromium/paper-styles/color.js
 
 # TODO create components summary
-# TODO generate gn
+
+echo 'Creating GN files for interfaces and externs...'
+../v1_0/generate_gn.sh 3 # polymer_version=3
+
 # TODO find unused elements?

tools/polymer/generate_gn_v3.py

+#!/usr/bin/env python
+# Copyright 2019 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.
+
+from datetime import date
+import json
+import os.path as path
+import sys
+
+_COMPILE_JS = '//third_party/closure_compiler/compile_js.gni'
+_WEB_ANIMATIONS_BASE = 'web-animations.html'
+_WEB_ANIMATIONS_EXTERNS = \
+    '//third_party/closure_compiler/externs/web_animations.js'
+_COMPILED_RESOURCES_TEMPLATE = '''
+# Copyright %d 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.
+#
+# NOTE: Created with %s, please do not edit.
+
+import("%s")
+
+%s
+'''.strip()
+
+_HERE_PATH = path.dirname(__file__)
+_SRC_PATH = path.normpath(path.join(_HERE_PATH, '..', '..'))
+sys.path.append(path.join(_SRC_PATH, 'third_party', 'node'))
+import node
+
+
+def main(created_by, input_files):
+    targets = ''
+
+    def _target_name(target_file):
+      return target_file[:-len('.js')]
+
+    def _extract_imports(input_file):
+      path_to_acorn = path.join('node_modules', 'acorn', 'bin', 'acorn');
+      ast = node.RunNode([path_to_acorn, '--module', input_file])
+      imports = map(lambda n: n['source']['raw'][1:-1],
+          filter(lambda n: n['type'] ==
+              'ImportDeclaration', json.loads(ast)['body']))
+      return set(imports)
+
+    for input_file in sorted(input_files, key=_target_name):
+      input_base = path.basename(input_file)
+      imports = _extract_imports(input_file)
+      dependencies = []
+      externs = ''
+
+      for i in sorted(imports):
+        import_dir, import_base = path.split(i.encode('ascii'))
+
+        if import_base == _WEB_ANIMATIONS_BASE:
+          externs += '\n  externs_list = [ "%s" ]' % _WEB_ANIMATIONS_EXTERNS
+          continue
+
+        # Redirect dependencies to minified Polymer to the non-minified version.
+        if import_base == 'polymer_bundled.min.js':
+          import_base = 'polymer_bundled.js'
+
+        target = ':' + _target_name(import_base)
+        dependencies.append(import_dir + target)
+
+      targets += '\njs_library("%s") {' % _target_name(input_base)
+      if dependencies:
+        targets += '\n  deps = ['
+        targets += '\n    "%s",' % '",\n    "'.join(dependencies)
+        targets += '\n  ]'
+      targets += externs
+      targets += '\n}\n'
+
+    targets = targets.strip()
+
+    if targets:
+      current_year = date.today().year
+      print _COMPILED_RESOURCES_TEMPLATE % (current_year, created_by,
+                                            _COMPILE_JS, targets)
+
+
+if __name__ == '__main__':
+  main(path.basename(sys.argv[0]), sys.argv[1:])