Don't treat warnings as errors when compiling minfrog items.

tools/testing/perf_testing/create_graph.py

Index: tools/testing/perf_testing/create_graph.py
===================================================================
--- tools/testing/perf_testing/create_graph.py	(revision 2456)
+++ tools/testing/perf_testing/create_graph.py	(working copy)
@@ -57,7 +57,8 @@
   out = subprocess.PIPE
   if outfile:
     mode = 'w'
-    if append:
+    if append

[Siggi Cherem (dart-lang), 2011/12/16 00:24:32]

I believe the : should stay on this line?

+    # On Windows, shell must be true to get the correct environment variables.:
       mode = 'a'
     out = open(outfile, mode)
   p = subprocess.Popen(cmd_list, stdout = out, stderr = subprocess.PIPE)
@@ -589,8 +590,7 @@
     RunCmd(['echo', '%f Compiling on Dart VM in production mode in seconds' 
         % elapsed], self.trace_file, append=True)
     elapsed = TimeCmd([os.path.join('.', 'minfrog'), '--out=minfrog',
-        '--warnings_as_errors', 'minfrog.dart', os.path.join('tests', 
-        'hello.dart')])
+        'minfrog.dart', os.path.join('tests', 'hello.dart')])
     if elapsed < self.failure_threshold['Bootstrapping']:
       #minfrog didn't compile correctly. Stop testing now, because subsequent
       #numbers will be meaningless.