Ignore Polymer bound src="[[attr]]" from grit processing.

grit/format/html_inline.py

 #!/usr/bin/env python
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Flattens a HTML file by inlining its external resources.
 
 This is a small script that takes a HTML file, looks for src attributes
 and inlines the specified file, producing one HTML file with no external
 dependencies. It recursively inlines the included files.
@@ skipping 28 matching lines @@
 _END_IF_BLOCK = lazy_re.compile('\s*</if>')
 
 # Used by DoInline to replace various links with inline content.
 _STYLESHEET_RE = lazy_re.compile(
     '<link rel="stylesheet"[^>]+?href="(?P<filename>[^"]*)".*?>(\s*</link>)?',
     re.DOTALL)
 _INCLUDE_RE = lazy_re.compile(
     '<include[^>]+?src="(?P<filename>[^"\']*)".*?>(\s*</include>)?',
     re.DOTALL)
 _SRC_RE = lazy_re.compile(
-    r'<(?!script)(?:[^>]+?\s)src=(?P<quote>")(?P<filename>[^"\']*)\1',
+    r'<(?!script)(?:[^>]+?\s)src=(?P<quote>")(?!\[\[|{{)(?P<filename>[^"\']*)\1',
     re.MULTILINE)
 _ICON_RE = lazy_re.compile(
     r'<link rel="icon"\s(?:[^>]+?\s)?'
     'href=(?P<quote>")(?P<filename>[^"\']*)\1',
     re.MULTILINE)
 
 
 def GetDistribution():
   """Helper function that gets the distribution we are building.
 
@@ skipping 354 matching lines @@
 
 def main():
   if len(sys.argv) <= 2:
     print "Flattens a HTML file by inlining its external resources.\n"
     print "html_inline.py inputfile outputfile"
   else:
     InlineToFile(sys.argv[1], sys.argv[2], None)
 
 if __name__ == '__main__':
   main()