Allow import of .gitignore from wpt.

third_party/WebKit/Tools/Scripts/webkitpy/w3c/test_copier.py

Index: third_party/WebKit/Tools/Scripts/webkitpy/w3c/test_copier.py
diff --git a/third_party/WebKit/Tools/Scripts/webkitpy/w3c/test_copier.py b/third_party/WebKit/Tools/Scripts/webkitpy/w3c/test_copier.py
index 7e65dc1029fdaeed86150975b7484e5708e735a1..e026c9b41453d868ef054d437d1419ff012fd0e5 100644
--- a/third_party/WebKit/Tools/Scripts/webkitpy/w3c/test_copier.py
+++ b/third_party/WebKit/Tools/Scripts/webkitpy/w3c/test_copier.py
@@ -139,10 +139,12 @@ class TestCopier(object):
                         continue
                 # FIXME: This block should really be a separate function, but the early-continues make that difficult.
 
-                if filename.startswith('.') or filename.endswith('.pl'):
+                # TODO(qyearsley): Remove the below block.
+                if filename.startswith('.gitkeep') or filename.endswith('.pl'):

[jeffcarp, 2017/03/07 01:17:11]

As we talked about in person, I think it would be less risky to make this
exclude all dotfiles except .gitignore.

                     _log.debug('Skipping: %s', path_full)
                     _log.debug('  Reason: Hidden files and perl scripts are not necessary.')
                     continue
+
                 if filename == 'OWNERS' or filename == 'reftest.list':
                     # See http://crbug.com/584660 and http://crbug.com/582838.
                     _log.debug('Skipping: %s', path_full)