Allow trychange to submit empty patch sets again.
A recent change to trychange prevents empty patches from being submitted:
https://codereview.chromium.org/184343003/diff/210001/trychange.py
parasite (used for the gyp waterfall) relies on empty patches to share nacl
trybots to build gyp at particular revisions.
BUG=None
TEST=local on master3
R=nodir@chromium.org
Review URL: https://codereview.chromium.org/228883004
git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@262493 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/trychange.py b/trychange.py
index f352243..68a84e4 100755
--- a/trychange.py
+++ b/trychange.py
@@ -500,7 +500,7 @@
temp_dir = tempfile.mkdtemp(prefix=name)
try:
path = os.path.join(temp_dir, name)
- if contents:
+ if contents is not None:
with open(path, 'wb') as f:
f.write(contents)
yield path