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

chrome/app/theme/PRESUBMIT.py

Index: chrome/app/theme/PRESUBMIT.py
diff --git a/chrome/app/theme/PRESUBMIT.py b/chrome/app/theme/PRESUBMIT.py
index 96aa98a6a7436ad068def112e656bc197c5e2328..890aa74df7ae3a93adaca389dc02ef7f6a88d619 100644
--- a/chrome/app/theme/PRESUBMIT.py
+++ b/chrome/app/theme/PRESUBMIT.py
@@ -28,8 +28,8 @@ 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/')],
-    [(1, 'touch_100_percent/'), (2, 'touch_200_percent/')],
+    [(100, 'default_100_percent/'), (200, 'default_200_percent/')],
+    [(100, 'touch_100_percent/'), (200, 'touch_200_percent/')],
   ]
 
   import sys