Change actions.txt to actions.xml

tools/metrics/histograms/update_policies.py

Index: tools/metrics/histograms/update_policies.py
diff --git a/tools/metrics/histograms/update_policies.py b/tools/metrics/histograms/update_policies.py
index 5cad317512b3916541dc3d4d34ea3e55ea00b37d..79f524f690b97a526fb139a90d0fd5233679b797 100644
--- a/tools/metrics/histograms/update_policies.py
+++ b/tools/metrics/histograms/update_policies.py
@@ -8,6 +8,7 @@ definitions read from policy_templates.json.
 If the file was pretty-printed, the updated version is pretty-printed too.
 """
 
+import os
 import re
 import sys
 
@@ -15,12 +16,15 @@ from ast import literal_eval
 from optparse import OptionParser
 from xml.dom import minidom
 
-from diffutil import PromptUserToAcceptDiff
-from pretty_print import PrettyPrintNode
+import print_style
+
+# Import the metrics/common module.
+sys.path.append(os.path.join(os.path.dirname(__file__), '..', 'common'))
+from diff_util import PromptUserToAcceptDiff
 
 HISTOGRAMS_PATH = 'histograms.xml'
-POLICY_TEMPLATES_PATH =
-    '../../../components/policy/resources/policy_templates.json'
+POLICY_TEMPLATES_PATH = (
+    '../../../components/policy/resources/policy_templates.json')
 ENUM_NAME = 'EnterprisePolicies'
 
 class UserError(Exception):
@@ -118,8 +122,7 @@ def main():
     xml = f.read()
 
   UpdateHistogramDefinitions(policy_templates, histograms_doc)
-
-  new_xml = PrettyPrintNode(histograms_doc)
+  new_xml = print_style.GetPrintStyle().PrettyPrintNode(histograms_doc)
   if PromptUserToAcceptDiff(xml, new_xml, 'Is the updated version acceptable?'):
     with open(HISTOGRAMS_PATH, 'wb') as f:
       f.write(new_xml)