Add IE support.

lib/src/runner/browser/internet_explorer.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.browser.chrome;
+library test.runner.browser.internet_explorer;
 
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
 
 import 'package:path/path.dart' as p;
 import 'package:stack_trace/stack_trace.dart';
 
-import '../../util/io.dart';
 import '../../utils.dart';
 import '../application_exception.dart';
 import 'browser.dart';
 
-// TODO(nweiz): move this into its own package?
-// TODO(nweiz): support other browsers.
-/// A class for running an instance of Chrome.
-///
-/// Most of the communication with the browser is expected to happen via HTTP,
-/// so this exposes a bare-bones API. The browser starts as soon as the class is
-/// constructed, and is killed when [close] is called.
+/// A class for running an instance of Internet Explorer.
 ///
 /// Any errors starting or running the process are reported through [onExit].
-class Chrome implements Browser {
+class InternetExplorer implements Browser {
   /// The underlying process.
   Process _process;
 
   Future get onExit => _onExitCompleter.future;
   final _onExitCompleter = new Completer();
 
   /// A future that completes when the browser process has started.
   ///
   /// This is used to ensure that [close] works regardless of when it's called.
   Future get _onProcessStarted => _onProcessStartedCompleter.future;
   final _onProcessStartedCompleter = new Completer();
 
-  /// Starts a new instance of Chrome open to the given [url], which may be a
-  /// [Uri] or a [String].
+  /// Starts a new instance of Internet Explorer open to the given [url], which
+  /// may be a [Uri] or a [String].
   ///
-  /// If [executable] is passed, it's used as the Chrome executable. Otherwise
-  /// the default executable name for the current OS will be used.
-  Chrome(url, {String executable}) {
+  /// If [executable] is passed, it's used as the Internet Explorer executable.
+  /// Otherwise the default executable name will be used.
+  InternetExplorer(url, {String executable}) {
     if (executable == null) executable = _defaultExecutable();
 
     // Don't return a Future here because there's no need for the caller to wait
     // for the process to actually start. They should just wait for the HTTP
     // request instead.
-    withTempDir((dir) {
-      return Process.start(executable, [
-        "--user-data-dir=$dir",
-        url.toString(),
-        "--disable-extensions",
-        "--disable-popup-blocking",
-        "--bwsi",
-        "--no-first-run",
-        "--no-default-browser-check",
-        "--disable-default-apps",
-        "--disable-translate"
-      ]).then((process) {
-        _process = process;
-        _onProcessStartedCompleter.complete();
+    Process.start(executable, ['-extoff', url.toString()])
+        .then((process) {
+      _process = process;
+      _onProcessStartedCompleter.complete();
 
-        // TODO(nweiz): the browser's standard output is almost always useless
-        // noise, but we should allow the user to opt in to seeing it.
-        return _process.exitCode;
-      });
+      // TODO(nweiz): the browser's standard output is almost always useless
+      // noise, but we should allow the user to opt in to seeing it.
+      return _process.exitCode;
     }).then((exitCode) {
       if (exitCode == 0) return null;
 
       return UTF8.decodeStream(_process.stderr).then((error) {
         throw new ApplicationException(
-            "Chrome failed with exit code $exitCode:\n$error");
+            "Internet Explorer failed with exit code $exitCode:\n$error");
       });
     }).then(_onExitCompleter.complete).catchError((error, stackTrace) {
       if (stackTrace == null) stackTrace = new Trace.current();
       _onExitCompleter.completeError(
           new ApplicationException(
-              "Failed to start Chrome: ${getErrorMessage(error)}."),
+              "Failed to start Internet Explorer: ${getErrorMessage(error)}."),
           stackTrace);
     });
   }
 
   Future close() {
     _onProcessStarted.then((_) => _process.kill());
 
     // Swallow exceptions. The user should explicitly use [onExit] for these.
     return onExit.catchError((_) {});
   }
 
   /// Return the default executable for the current operating system.
   String _defaultExecutable() {
-    if (Platform.isMacOS) {
-      return '/Applications/Google Chrome.app/Contents/MacOS/Google Chrome';
-    }
-    if (!Platform.isWindows) return 'google-chrome';
-
     // Chrome could be installed in several places on Windows. The only way to
     // find it is to check.
     var prefixes = [
-      Platform.environment['LOCALAPPDATA'],
+      Platform.environment['PROGRAMW6432'],
       Platform.environment['PROGRAMFILES'],
       Platform.environment['PROGRAMFILES(X86)']
     ];
-    var suffix = r'Google\Chrome\Application\chrome.exe';
+    var suffix = r'Internet Explorer\iexplore.exe';
 
     for (var prefix in prefixes) {
       if (prefix == null) continue;
 
       var path = p.join(prefix, suffix);
       if (new File(p.join(prefix, suffix)).existsSync()) return path;
     }
 
     // Fall back on looking it up on the path. This probably won't work, but at
     // least it will fail with a useful error message.
-    return "chrome.exe";
+    return "iexplore.exe";
   }
 }