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

mojo/public/dart/third_party/test/lib/src/backend/test_platform.dart

Index: mojo/public/dart/third_party/test/lib/src/backend/test_platform.dart
diff --git a/mojo/public/dart/third_party/test/lib/src/backend/test_platform.dart b/mojo/public/dart/third_party/test/lib/src/backend/test_platform.dart
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+// Copyright (c) 2015, 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.
+
+library test.backend.test_platform;
+
+// TODO(nweiz): support pluggable platforms.
+/// An enum of all platforms on which tests can run.
+class TestPlatform {
+  // When adding new platforms, be sure to update the baseline and derived
+  // variable tests in test/backend/platform_selector/evaluate_test.
+
+  /// The command-line Dart VM.
+  static const TestPlatform vm =
+      const TestPlatform._("VM", "vm", isDartVM: true);
+
+  /// Dartium.
+  static const TestPlatform dartium = const TestPlatform._("Dartium", "dartium",
+      isBrowser: true, isBlink: true, isDartVM: true);
+
+  /// Dartium content shell.
+  static const TestPlatform contentShell = const TestPlatform._(
+      "Dartium Content Shell", "content-shell",
+      isBrowser: true, isBlink: true, isDartVM: true, isHeadless: true);
+
+  /// Google Chrome.
+  static const TestPlatform chrome = const TestPlatform._("Chrome", "chrome",
+      isBrowser: true, isJS: true, isBlink: true);
+
+  /// PhantomJS.
+  static const TestPlatform phantomJS = const TestPlatform._(
+      "PhantomJS", "phantomjs",
+      isBrowser: true, isJS: true, isBlink: true, isHeadless: true);
+
+  /// Mozilla Firefox.
+  static const TestPlatform firefox = const TestPlatform._("Firefox", "firefox",
+      isBrowser: true, isJS: true);
+
+  /// Apple Safari.
+  static const TestPlatform safari = const TestPlatform._("Safari", "safari",
+      isBrowser: true, isJS: true);
+
+  /// Microsoft Internet Explorer.
+  static const TestPlatform internetExplorer = const TestPlatform._(
+      "Internet Explorer", "ie",
+      isBrowser: true, isJS: true);
+
+  /// A list of all instances of [TestPlatform].
+  static const List<TestPlatform> all = const [
+    vm,
+    dartium,
+    contentShell,
+    chrome,
+    phantomJS,
+    firefox,
+    safari,
+    internetExplorer
+  ];
+
+  /// Finds a platform by its identifier string.
+  ///
+  /// If no platform is found, returns `null`.
+  static TestPlatform find(String identifier) =>
+      all.firstWhere((platform) => platform.identifier == identifier,
+          orElse: () => null);
+
+  /// The human-friendly name of the platform.
+  final String name;
+
+  /// The identifier used to look up the platform.
+  final String identifier;
+
+  /// Whether this platform runs the Dart VM in any capacity.
+  final bool isDartVM;
+
+  /// Whether this platform is a browser.
+  final bool isBrowser;
+
+  /// Whether this platform runs Dart compiled to JavaScript.
+  final bool isJS;
+
+  /// Whether this platform uses the Blink rendering engine.
+  final bool isBlink;
+
+  /// Whether this platform has no visible window.
+  final bool isHeadless;
+
+  const TestPlatform._(this.name, this.identifier, {this.isDartVM: false,
+      this.isBrowser: false, this.isJS: false, this.isBlink: false,
+      this.isHeadless: false});
+
+  String toString() => name;
+}