Add a support for a slow marker in status files.

tools/testing/dart/test_runner.dart

Index: tools/testing/dart/test_runner.dart
===================================================================
--- tools/testing/dart/test_runner.dart	(revision 10699)
+++ tools/testing/dart/test_runner.dart	(working copy)
@@ -18,6 +18,7 @@
 #import("test_suite.dart");
 
 final int NO_TIMEOUT = 0;
+final int SLOW_TIMEOUT_MULTIPLIER = 4;
 
 /** A command executed as a step in a test case. */
 class Command {
@@ -124,7 +125,13 @@
     }
   }
 
-  int get timeout() => configuration['timeout'];
+  int get timeout() {
+    int timeout = configuration['timeout'];
+    if (expectedOutcomes.contains(SLOW)) {
+      timeout *= SLOW_TIMEOUT_MULTIPLIER;
+    }
+    return timeout;
+  }
 

[Bill Hesse, 2012/08/15 11:41:03]

How about 
  if (expectedOutcomes.contains(SLOW)) {
    return SLOW_TIMEOUT_MULTIPLIER * configuration['timeout'];
} else {
  return configuration['timeout'];
}
or even 
 => expectedOutcomes.contains(SLOW) ?
   ... :
   ... ;

   String get configurationString() {
     final compiler = configuration['compiler'];