Re-land: Change actions.txt to actions.xml

tools/metrics/histograms/update_extension_functions.py

Index: tools/metrics/histograms/update_extension_functions.py
diff --git a/tools/metrics/histograms/update_extension_functions.py b/tools/metrics/histograms/update_extension_functions.py
index 3bc631550734389d3ef67ee8bd0d2b60b5afbef9..0783f32642f140467918c25420150b5354aa83bf 100644
--- a/tools/metrics/histograms/update_extension_functions.py
+++ b/tools/metrics/histograms/update_extension_functions.py
@@ -9,13 +9,16 @@ If the file was pretty-printed, the updated version is pretty-printed too.
 """
 
 import logging
+import os
 import re
 import sys
 
 from xml.dom import minidom
+import print_style
 
-from diffutil import PromptUserToAcceptDiff
-from pretty_print import PrettyPrintNode
+# 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'
 ENUM_NAME = 'ExtensionFunctions'
@@ -136,7 +139,8 @@ def main():
   UpdateHistogramDefinitions(histogram_values, histograms_doc)
 
   Log('Writing out new histograms file.')
-  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)