Reapply "Create an app snapshot of the Dart front end."

BUILD.gn

 # Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 # This target will be built if no target is specified when invoking ninja.
 group("default") {
   if (defined(is_fuchsia) && (is_fuchsia || is_fuchsia_host)) {
     # Fuchsia has run_vm_tests marked testonly.
     testonly = true
   }
@@ skipping 24 matching lines @@
     testonly = true
   }
   deps = [
     "runtime/bin:dart",
     "runtime/bin:dart_bootstrap($host_toolchain)",
     "runtime/bin:process_test",
     "runtime/bin:run_vm_tests",
     "runtime/bin:sample_extension",
     "runtime/bin:test_extension",
     "runtime/vm:patched_sdk",
+
+    # TODO(rmacnak): Link this into 'dart'
+    "utils/kernel-service:kernel-service",
   ]
 }
 
 group("runtime_precompiled") {
   deps = [
     "runtime/bin:dart_bootstrap($host_toolchain)",
     "runtime/bin:dart_precompiled_runtime",
     "runtime/bin:process_test",
     "runtime/vm:patched_sdk",
   ]
@@ skipping 60 matching lines @@
   ]
 
   script = "tools/create_sdk.py"
   args = [
     "--sdk_output_dir",
     rebase_path("$root_out_dir/dart-sdk"),
     "--snapshot_location",
     rebase_path("$root_gen_dir"),
   ]
   if (defined(is_fuchsia) && is_fuchsia_host) {
-    args += [
-      "--copy_libs"
-    ]
+    args += [ "--copy_libs" ]
   }
 }
 
 group("dart2js") {
   deps = [
     "utils/compiler:dart2js",
   ]
 }
 
 group("dartanalyzer") {
@@ skipping 28 matching lines @@
     ":create_sdk",
   ]
 }
 
 group("samples") {
   deps = [
     "runtime/bin:sample_extension",
   ]
 }
 
-
 # The rules below build a qemu Fuchsia OS image that includes the Dart tree
 # under /system/test/dart. Building this image is gated by the GN argument
 # 'dart_build_fuchsia_test_image' because building the image is slow.
-if (defined(is_fuchsia) && (is_fuchsia)) {
+if (defined(is_fuchsia) && is_fuchsia) {
   declare_args() {
     dart_build_fuchsia_test_image = false
   }
 
   if (dart_build_fuchsia_test_image) {
     action("generate_dart_test_manifest") {
       testonly = true
 
       deps = [
         "//packages/gn:mkbootfs",
@@ skipping 19 matching lines @@
         "-u",
         rebase_path(user_manifest),
         "-o",
         rebase_path(output_prefix),
       ]
     }
 
     action("generate_dart_test_image") {
       testonly = true
       deps = [
+        ":generate_dart_test_manifest",
         "runtime/bin:dart",
+        "runtime/bin:process_test",
         "runtime/bin:run_vm_tests",
-        "runtime/bin:process_test",
-        ":generate_dart_test_manifest",
       ]
 
       input = "$target_gen_dir/dart_test_tree.manifest"
       inputs = [
         input,
       ]
 
       output = "$root_out_dir/dart_test_tree.bin"
       outputs = [
         output,
       ]
 
       script = "//packages/gn/make_bootfs.py"
       args = [
         "--manifest",
         rebase_path(input),
         "--output-file",
         rebase_path(output),
         "--build-id-map",
         rebase_path("$target_gen_dir/build_id_map"),
         "--compress",
       ]
     }
   }
 }