Stop running pub get at gclient sync time and fix build bugs

third_party/dart-pkg/BUILD.gn

Index: third_party/dart-pkg/BUILD.gn
diff --git a/third_party/dart-pkg/BUILD.gn b/third_party/dart-pkg/BUILD.gn
deleted file mode 100644
index 8df39ea5a1b12e21c39ade5fa72329c1e1d64de2..0000000000000000000000000000000000000000
--- a/third_party/dart-pkg/BUILD.gn
+++ /dev/null
@@ -1,70 +0,0 @@
-# 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")
-
-group("dart-pkg") {
-  deps = [
-    ":archive",
-    ":args",
-    ":box2d",
-    ":cassowary",
-    ":collection",
-    ":crypto",
-    ":path",
-    ":quiver",
-    ":source_span",
-    ":string_scanner",
-    ":vector_math",
-    ":yaml",
-  ]
-}
-
-dart_pkg("archive") {
-  pkg_dir = "//third_party/dart-pkg/archive"
-}
-
-dart_pkg("args") {
-  pkg_dir = "//third_party/dart-pkg/args"
-}
-
-dart_pkg("box2d") {
-  pkg_dir = "//third_party/dart-pkg/box2d"
-}
-
-dart_pkg("cassowary") {
-  pkg_dir = "//third_party/dart-pkg/cassowary"
-}
-
-dart_pkg("collection") {
-  pkg_dir = "//third_party/dart-pkg/collection"
-}
-
-dart_pkg("crypto") {
-  pkg_dir = "//third_party/dart-pkg/crypto"
-}
-
-dart_pkg("path") {
-  pkg_dir = "//third_party/dart-pkg/path"
-}
-
-dart_pkg("quiver") {
-  pkg_dir = "//third_party/dart-pkg/quiver"
-}
-
-dart_pkg("source_span") {
-  pkg_dir = "//third_party/dart-pkg/source_span"
-}
-
-dart_pkg("string_scanner") {
-  pkg_dir = "//third_party/dart-pkg/string_scanner"
-}
-
-dart_pkg("vector_math") {
-  pkg_dir = "//third_party/dart-pkg/vector_math"
-}
-
-dart_pkg("yaml") {
-  pkg_dir = "//third_party/dart-pkg/yaml"
-}