Add support for non-integer scaling factors in resource_scale_factors presubmit script

ui/resources/PRESUBMIT.py

Index: ui/resources/PRESUBMIT.py
diff --git a/ui/resources/PRESUBMIT.py b/ui/resources/PRESUBMIT.py
index 9b2c4ddceb65dab52798743e0aabb9e4293b29f1..0408a5216f2283132ab4be6cb24831b2159c035a 100644
--- a/ui/resources/PRESUBMIT.py
+++ b/ui/resources/PRESUBMIT.py
@@ -27,7 +27,7 @@ def _CommonChecks(input_api, output_api):
   # List of paths with their associated scale factor. This is used to verify
   # that the images modified in one are the correct scale of the other.
   path_scales = [
-    [(1, 'default_100_percent/'), (2, 'default_200_percent/')],
+    [(100, 'default_100_percent/'), (200, 'default_200_percent/')],
   ]
 
   import sys