Update enumerate_files.py to ignore "hidden" files.

Skip over files that begin with '.' since they are often hidden temporary
files.

BUG=angle:553

Change-Id: I74f8412e6959c49bfca7f0ae063af42027e12549
Reviewed-on: https://chromium-review.googlesource.com/188035
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Shannon Woods <shannonwoods@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>
diff --git a/enumerate_files.py b/enumerate_files.py
index 3dc36dd..06ebf9d 100644
--- a/enumerate_files.py
+++ b/enumerate_files.py
@@ -40,6 +40,10 @@
 for rootdir in dirs:
     for root, dirnames, filenames in os.walk(rootdir):
         for file in filenames:
+            # Skip files that are "hidden"
+            if file.startswith("."):
+                continue;
+
             fullPath = os.path.join(root, file).replace("\\", "/")
             for type in types:
                 if fnmatch.fnmatchcase(fullPath, type):