Make tools/test.dart read standalone.status status file when running tests.

tools/testing/dart/status_file_parser.dart

Index: tools/testing/dart/status_file_parser.dart
diff --git a/tools/testing/dart/status_file_parser.dart b/tools/testing/dart/status_file_parser.dart
index d7a7345214ba3381667fa64ecf7a0bc30967bbdf..43f3077f7165650640805ba68b74c7739ab6ca86 100644
--- a/tools/testing/dart/status_file_parser.dart
+++ b/tools/testing/dart/status_file_parser.dart
@@ -16,6 +16,7 @@ final RegExp PrefixPattern = const RegExp(@"^\s*prefix\s+([\w\_\.\-\/]+)\s*$");
 // structures for test configuration, including Section.
 class Section {
   BooleanExpression condition;
+  Collection testSettings = const [];
 
   Section.always() : condition = null;
   Section(this.condition);
@@ -27,6 +28,9 @@ class Section {
 String getFilename(String path) =>
     new File(path).existsSync() ? path : '../$path';
 
+String getDirname(String path) =>
+    new Directory(path).existsSync() ? path : '../$path';
+
  
 void ReadConfigurationInto(path, sections) {
   File file = new File(getFilename(path));