Add --step_name option to test.dart.

dart/utils/compiler/buildbot.py

Index: dart/utils/compiler/buildbot.py
diff --git a/dart/utils/compiler/buildbot.py b/dart/utils/compiler/buildbot.py
index 6da39b1e23e24ecc63f3a246ece894744dfc2458..5c43f237f105b63e0381b5a00f40eb230a156d23 100644
--- a/dart/utils/compiler/buildbot.py
+++ b/dart/utils/compiler/buildbot.py
@@ -109,7 +109,7 @@ def TestStepName(name, flags):
 
 
 def TestStep(name, mode, system, compiler, runtime, targets, flags):
-  print '@@@BUILD_STEP %s@@@' % TestStepName(name, flags)
+  step_name = TestStepName(name, flags)
   sys.stdout.flush()
   if NeedsXterm(compiler, runtime) and system == 'linux':
     cmd = ['xvfb-run', '-a']
@@ -120,6 +120,7 @@ def TestStep(name, mode, system, compiler, runtime, targets, flags):
 

[ricow1, 2012/09/11 08:14:38]

Why don't we print the @@@BUILD_STEP $step_name@@@ here instead of in the
test.dart script?

   cmd.extend([sys.executable,
               os.path.join(os.curdir, 'tools', 'test.py'),
+              '--step_name=' + step_name,
               '--mode=' + mode,
               '--compiler=' + compiler,
               '--runtime=' + runtime,