Add support for ie in the browser controller

tools/testing/dart/browser_controller.dart

Index: tools/testing/dart/browser_controller.dart
===================================================================
--- tools/testing/dart/browser_controller.dart	(revision 25812)
+++ tools/testing/dart/browser_controller.dart	(working copy)
@@ -54,6 +54,8 @@
       return new Chrome();
     } else if (name == 'safari') {
       return new Safari();
+    } else if (name.startsWith('ie')) {
+      return new IE();
     } else {
       throw "Non supported browser";
     }
@@ -347,6 +349,44 @@
   String toString() => "Chrome";
 }
 
+class IE extends Browser {
+
+  static const String binary = 
+      "c:\\Program Files\\Internet Explorer\\iexplore.exe";
+
+  Future<String> getVersion() {
+    var args = ["query",
+                "HKEY_LOCAL_MACHINE\\Software\\Microsoft\\Internet Explorer",
+		"/v",
+		"version"];
+    return Process.run("reg", args).then((result) {
+      if (result.exitCode == 0) {
+        // The string we get back looks like this:
+	// HKEY_LOCAL_MACHINE\Software\Microsoft\Internet Explorer
+        //    version    REG_SZ    9.0.8112.16421
+        var findString = "REG_SZ";
+        var index = result.stdout.indexOf("REG_SZ") + findString.length;
+	if (index > 0) {
+	  return result.stdout.substring(index).trim();
+        }
+      }
+      return "Could not get the version of internet explorer";
+    });
+  }
+
+
+  Future<bool> start(String url) {
+    _logEvent("Starting ie browser on: $url");
+    // Get the version and log that.
+    return getVersion().then((version) {
+      _logEvent("Got version: $version");
+      return startBrowser(binary, [url]);
+    });
+  }
+  String toString() => "IE";
+}
+
+
 class AndroidChrome extends Browser {
   static const String viewAction = 'android.intent.action.VIEW';
   static const String mainAction = 'android.intent.action.MAIN';
@@ -822,6 +862,9 @@
           DebugLogger.info("Handling non standard request to: "
                            "${request.uri.path}");
         }
+        request.response.headers.set("Cache-Control", "no-cache, no-store, must-revalidate");
+	request.response.headers.set("Pragma", "no-cache");
+	request.response.headers.set("Expires", "0");
         request.response.write(textResponse);
         request.listen((_) {}, onDone: request.response.close);
         request.response.done.then((_) {
@@ -942,6 +985,7 @@
               // URL#ID
               var split = this.responseText.split('#');
               var nextTask = split[0];
+
               current_id = split[1];
               reportError('Done getting task : ' + elapsed);
               did_start = false;