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

mojo/public/dart/third_party/analyzer/lib/task/general.dart

+// 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 analyzer.task.general;
+
+import 'package:analyzer/src/generated/source.dart';
+import 'package:analyzer/task/model.dart';
+
+/**
+ * The content of a [Source].
+ */
+final ResultDescriptor<String> CONTENT =
+    new ResultDescriptor<String>('CONTENT', null);
+
+/**
+ * The line information for a [Source].
+ */
+final ResultDescriptor<LineInfo> LINE_INFO =
+    new ResultDescriptor<LineInfo>('LINE_INFO', null);
+
+/**
+ * The modification time of a [Source].
+ */
+final ResultDescriptor<int> MODIFICATION_TIME =
+    new ResultDescriptor<int>('MODIFICATION_TIME', -1);