Polymer: Fix minify_polymer.py to work with recent shell=False changes.

The change at r782918, which modified RunNode() to use shell=False,
broke this script, and started returning incorrect output (JS
comments were not stripped)

Bug: 1096473
Change-Id: I9d767d0ec2d92612ddf73c37e8ab70c4aedc6573
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2284015
Auto-Submit: dpapad <dpapad@chromium.org>
Reviewed-by: Rebekah Potter <rbpotter@chromium.org>
Commit-Queue: dpapad <dpapad@chromium.org>
Cr-Commit-Position: refs/heads/master@{#785833}

third_party/polymer/v1_0/minify_polymer.py

@@ -55,7 +55,7 @@ def main():
     extracted_js = os.path.join(tmp_out_dir, 'polymer-extracted.js')
     node.RunNode([
         node_modules.PathToUglify(), extracted_js,
-        '--comments', '"/Copyright|license|LICENSE/"',
+        '--comments', '/Copyright|license|LICENSE/',
         '--output', extracted_js])
 
     # Copy generated bundled JS/HTML files back to the original location.

third_party/polymer/v3_0/minify_polymer.py

@@ -53,7 +53,7 @@ def main():
     node.RunNode([
         node_modules.PathToUglify(), bundled_js,
         # TODO(dpapad): Figure out a way to deduplicate LICENSE headers.
-        #'--comments', '"/Copyright|license|LICENSE/"',
+        #'--comments', '/Copyright|license|LICENSE/',
         '--output', minified_js])
 
     # Copy generated JS bundle back to the original location.