Temporary, only escape quotes if run in shell.

runtime/bin/process_patch.dart

 // Copyright (c) 2013, 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.
 
 patch class _WindowsCodePageDecoder {
   /* patch */ static String _decodeBytes(List<int> bytes)
       native "SystemEncodingToString";
 }
 
 
@@ skipping 51 matching lines @@
   String _errorMessage;  // Set to OS error message if process start failed.
 }
 
 
 class _ProcessImpl extends NativeFieldWrapperClass1 implements Process {
   _ProcessImpl(String path,
                List<String> arguments,
                String this._workingDirectory,
                Map<String, String> environment,
                bool runInShell) {
-    if (identical(runInShell, true)) {
+    runInShell = identical(runInShell, true);
+    if (runInShell) {
       arguments = _getShellArguments(path, arguments);
       path = _getShellCommand();
     }
 
     if (path is !String) {
       throw new ArgumentError("Path is not a String: $path");
     }
     _path = path;
 
     if (arguments is !List) {
       throw new ArgumentError("Arguments is not a List: $arguments");
     }
     int len = arguments.length;
     _arguments = new List<String>(len);
     for (int i = 0; i < len; i++) {
       var arg = arguments[i];
       if (arg is !String) {
         throw new ArgumentError("Non-string argument: $arg");
       }
       _arguments[i] = arguments[i];
       if (Platform.operatingSystem == 'windows') {
-        _arguments[i] = _windowsArgumentEscape(_arguments[i]);
+        _arguments[i] = _windowsArgumentEscape(_arguments[i],
+                                               shellEscape: runInShell);
       }
     }
 
     if (_workingDirectory != null && _workingDirectory is !String) {
       throw new ArgumentError(
           "WorkingDirectory is not a String: $_workingDirectory");
     }
 
     if (environment != null) {
       var env = environment;
@@ skipping 44 matching lines @@
       shellArguments.add("-c");
       for (var arg in arguments) {
         arg = arg.replaceAll("'", "'\"'\"'");
         commandLine.write(" '$arg'");
       }
       shellArguments.add(commandLine.toString());
     }
     return shellArguments;
   }
 
-  String _windowsArgumentEscape(String argument) {
+  String _windowsArgumentEscape(String argument, { bool shellEscape: false }) {
     var result = argument;
     if (argument.contains('\t') ||
         argument.contains(' ') ||
-        argument.contains('"')) {
+        // TODO(ajohnsen): Remove shellEscape.
+        (shellEscape && argument.contains('"'))) {
       // Produce something that the C runtime on Windows will parse
       // back as this string.
 
       // Replace any number of '\' followed by '"' with
       // twice as many '\' followed by '\"'.
       var backslash = '\\'.codeUnitAt(0);
       var sb = new StringBuffer();
       var nextPos = 0;
       var quotePos = argument.indexOf('"', nextPos);
       while (quotePos != -1) {
@@ skipping 207 matching lines @@
   const _ProcessResult(int this.pid,
                        int this.exitCode,
                        String this.stdout,
                        String this.stderr);
 
   final int pid;
   final int exitCode;
   final String stdout;
   final String stderr;
 }