Include chromium version number in policy templates

grit/format/policy_templates/writers/doc_writer.py

Index: grit/format/policy_templates/writers/doc_writer.py
===================================================================
--- grit/format/policy_templates/writers/doc_writer.py	(revision 177)
+++ grit/format/policy_templates/writers/doc_writer.py	(working copy)
@@ -590,6 +590,10 @@
 
   def BeginTemplate(self):
     # Add a <div> for the summary section.
+    if self._GetChromiumVersionString() is not None:
+      self.AddComment(self._main_div, self.config['build'] + \
+          ' version: ' + self._GetChromiumVersionString())
+
     summary_div = self.AddElement(self._main_div, 'div')
     self.AddElement(summary_div, 'a', {'name': 'top'})
     self.AddElement(summary_div, 'br')