Add cross-origin test with credentials.

tools/testing/dart/test_suite.dart

Index: tools/testing/dart/test_suite.dart
diff --git a/tools/testing/dart/test_suite.dart b/tools/testing/dart/test_suite.dart
index 4d0447275815800715b575d2e178214739be9c54..0d0b49559fb7c49e1c06e07f295e95d1a2f89308 100644
--- a/tools/testing/dart/test_suite.dart
+++ b/tools/testing/dart/test_suite.dart
@@ -704,7 +704,7 @@ class StandardTestSuite extends TestSuite {
       String tempDir = createOutputDirectory(info.filePath, '');
       args.add('--out=$tempDir/out.js');
 
-       List<Command> commands = 
+       List<Command> commands =
            <Command>[new CompilationCommand("$tempDir/out.js",
                                             !useDart2JsFromSdk,
                                             dart2JsBootstrapDependencies,
@@ -863,11 +863,6 @@ class StandardTestSuite extends TestSuite {
       // Create the HTML file for the test.
       RandomAccessFile htmlTest = new File(htmlPath).openSync(FileMode.WRITE);
       String filePrefix = '';

[Mads Ager (google), 2013/01/02 10:09:50]

Looks like filePrefix can be completely removed?

[Emily Fortuna, 2013/01/04 00:51:03]

Done.

-      if (Platform.operatingSystem == 'windows') {
-        // Firefox on Windows does not like absolute file path names that start
-        // with 'C:' adding 'file:///' solves the problem.
-        filePrefix = 'file:///';
-      }
       String content = null;
       Path dir = filePath.directoryPath;
       String nameNoExt = filePath.filenameWithoutExtension;
@@ -922,17 +917,20 @@ class StandardTestSuite extends TestSuite {
       do {
         List<Command> commandSet = new List<Command>.from(commands);
         if (subtestIndex != 0) {
-          // NOTE: The first time we enter this loop, all the compilation 
-          // commands will be executed. On subsequent loop iterations, we 
+          // NOTE: The first time we enter this loop, all the compilation
+          // commands will be executed. On subsequent loop iterations, we
           // don't need to do any compilations. Thus we set "commandSet = []".
           commandSet = [];
         }
 
         List<String> args = <String>[];
+        var basePath = TestUtils.dartDir().toString();
+        htmlPath = htmlPath.startsWith(basePath) ?
+            htmlPath.substring(basePath.length) : htmlPath;
         String fullHtmlPath = htmlPath.startsWith('http:') ? htmlPath :
             (htmlPath.startsWith('/') ?
-             'file://$htmlPath' :
-             'file:///$htmlPath');
+             'http://127.0.0.1:${SERVER_PORT_ONE}$htmlPath' :

[Mads Ager (google), 2013/01/02 10:09:50]

Do we now load all browser tests from the test server? In that case, we don't
have to hard code the port number any more which would be great (allowing us to
run the browser test scripts in parallel without getting into problems with
ports).

Now that the tests are loaded from the server, there is no need to hard-code the
port number in the test that uses it to load resources. Instead, we can use the
browser location object to construct the resource URI based on the current
location. The test we added the http server for was: 

date_time_format_http_request_test.dart

It uses the server to load a resource. Now that the test itself is loaded from
the server we don't need the port number in the test and can load the resource
relative to the current location?

This can be done as follow ups to this change.

[Emily Fortuna, 2013/01/04 00:51:03]

Done.

+             'http://127.0.0.1:${SERVER_PORT_ONE}/$htmlPath');
         if (info.optionsFromFile['isMultiHtmlTest']
             && subtestNames.length > 0) {
           fullHtmlPath = '${fullHtmlPath}#${subtestNames[subtestIndex]}';
@@ -971,7 +969,7 @@ class StandardTestSuite extends TestSuite {
           if (compiler == 'none') {
             var packageRootPath = packageRoot(optionsFromFile['packageRoot']);
             if (packageRootPath != null) {
-              var absolutePath = 
+              var absolutePath =
                   TestUtils.absolutePath(new Path(packageRootPath));
               packageRootUri = new Uri.fromComponents(
                   scheme: 'file',