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

mojo/public/dart/third_party/test/lib/src/runner/load_exception.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 test.runner.load_exception;
+
+import 'dart:isolate';
+
+import 'package:path/path.dart' as p;
+import 'package:source_span/source_span.dart';
+
+import '../utils.dart';
+
+/// A regular expression for matching filename annotations in
+/// [IsolateSpawnException] messages.
+final _isolateFileRegExp =
+    new RegExp(r"^'(file:/[^']+)': (error|warning): ", multiLine: true);
+
+class LoadException implements Exception {
+  final String path;
+
+  final innerError;
+
+  LoadException(this.path, this.innerError);
+
+  String toString({bool color: false}) {
+    var buffer = new StringBuffer();
+    if (color) buffer.write('\u001b[31m'); // red
+    buffer.write('Failed to load "$path":');
+    if (color) buffer.write('\u001b[0m'); // no color
+
+    var innerString = getErrorMessage(innerError);
+    if (innerError is IsolateSpawnException) {
+      // If this is a parse error, clean up the noisy filename annotations.
+      innerString = innerString.replaceAllMapped(_isolateFileRegExp, (match) {
+        if (p.fromUri(match[1]) == p.absolute(path)) return "";
+        return "${p.prettyUri(match[1])}: ";
+      });
+
+      // If this is a file system error, get rid of both the preamble and the
+      // useless stack trace.
+
+      // This message was used prior to 1.11.0-dev.3.0.
+      innerString = innerString.replaceFirst(
+          "Unhandled exception:\n"
+          "Uncaught Error: Load Error: ",
+          "");
+
+      // This message was used after 1.11.0-dev.3.0.
+      innerString = innerString.replaceFirst(
+          "Unhandled exception:\n"
+          "Load Error for ",
+          "");
+
+      innerString = innerString.replaceFirst("FileSystemException: ", "");
+      innerString = innerString.split("Stack Trace:\n").first.trim();
+    } if (innerError is SourceSpanException) {
+      innerString = innerError.toString(color: color)
+          .replaceFirst(" of $path", "");
+    }
+
+    buffer.write(innerString.contains("\n") ? "\n" : " ");
+    buffer.write(innerString);
+    return buffer.toString();
+  }
+}