Download material design icons using DEPS

sky/sdk/BUILD.gn

 # Copyright 2015 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("//mojo/public/dart/rules.gni")
 
-dart_pkg("sdk") {
+dart_pkg("sky") {
   sources = [
     "CHANGELOG.md",
     "bin/init.dart",
     "lib/animation/animated_value.dart",
     "lib/animation/curves.dart",
     "lib/animation/fling_curve.dart",
     "lib/animation/generators.dart",
     "lib/animation/mechanics.dart",
     "lib/animation/scroll_behavior.dart",
     "lib/assets/.gitignore",
@@ skipping 119 matching lines @@
     "//mojo/dart/mojo_services",
     "//mojo/dart/mojom",
     "//mojo/public/dart:mojo",
     "//sky/engine/bindings",
     "//sky/services/testing",
     "//third_party/dart-pkg",
   ]
 
   sdk_ext_directory = "$root_gen_dir/sky/bindings"
 }
+
+action("material_design_icons") {
+  input_dir = "lib/assets/material-design-icons"
+  output_dir = "$root_gen_dir/dart-pkg/sky/lib/assets"
+  stamp = "$target_gen_dir/material_design_icons_linked"
+
+  sources = [
+    "lib/assets/material-design-icons.sha1",
+  ]
+  outputs = [
+    stamp,
+  ]
+
+  script = "//build/symlink.py"
+  args = [
+    "--force",
+    rebase_path(input_dir, output_dir),
+    rebase_path(output_dir, root_build_dir),
+    "--touch",
+    rebase_path(stamp, root_build_dir),
+  ]
+
+  deps = [
+    ":sky",
+  ]
+}
+
+group("sdk") {
+  deps = [
+    ":sky",
+    ":material_design_icons",
+  ]
+}