Fix windows performance tests.

tools/testing/perf_testing/create_graph.py

Index: tools/testing/perf_testing/create_graph.py
===================================================================
--- tools/testing/perf_testing/create_graph.py	(revision 3859)
+++ tools/testing/perf_testing/create_graph.py	(working copy)
@@ -92,6 +92,13 @@
   run_cmd(['svn', 'revert',  os.path.join(os.getcwd(), 'frog', 'minfrog')])
 
   run_cmd(['gclient', 'sync'])
+ 
+  # On Windows, the output directory is marked as "Read Only," which causes an 
+  # error to be thrown when we use shutil.rmtree. This helper function changes
+  # the permissions so we can still delete the directory.
+  def on_rm_error(func, path, exc_info):
+    os.chmod(path, stat.S_IWRITE)
+    os.unlink(path)
   # TODO(efortuna): building the sdk locally is a band-aid until all build
   # platform SDKs are hosted in Google storage. Pull from https://sandbox.
   # google.com/storage/?arg=dart-dump-render-tree#dart-dump-render-tree%2Fsdk
@@ -100,7 +107,7 @@
   # have test statistics for what's passing on x64. Eliminate arch specification
   # when we have tests running on x64, too.
   shutil.rmtree(os.path.join(os.getcwd(), 
-    utils.GetBuildRoot(utils.GuessOS(), 'release', 'ia32')))
+    utils.GetBuildRoot(utils.GuessOS(), 'release', 'ia32')), onerror=on_rm_error)

[Siggi Cherem (dart-lang), 2012/02/02 19:22:16]

80 col

   lines = run_cmd([os.path.join('.', 'tools', 'build.py'), '-m', 'release',
     '--arch=ia32', 'create_sdk'])