Bot update!

scripts/common/chromium_utils.py

Index: scripts/common/chromium_utils.py
diff --git a/scripts/common/chromium_utils.py b/scripts/common/chromium_utils.py
index 8dc99953232fa102b82125a086a3d7ad944ad5bc..6f06995b046a5d1def2ea82e70571845587b8efe 100644
--- a/scripts/common/chromium_utils.py
+++ b/scripts/common/chromium_utils.py
@@ -407,6 +407,11 @@ def RemoveDirectory(*path):
   if not os.path.exists(file_path):
     return
 
+  if os.path.isfile(os.path.join(file_path, 'update.flag')):
+    print 'update.flag file found: bot_update has run and checkout is already '
+    print 'in a consistent state. No actions will be performed in this step.'
+    return
+
   if sys.platform == 'win32':
     # Give up and use cmd.exe's rd command.
     file_path = os.path.normcase(file_path)