Script to populate the XML for the CSS property UseCounter.

tools/metrics/histograms/update_use_counter_feature_enum.py

Index: tools/metrics/histograms/update_use_counter_feature_enum.py
diff --git a/tools/metrics/histograms/update_use_counter_feature_enum.py b/tools/metrics/histograms/update_use_counter_feature_enum.py
index ad4de167adddf8bbae33b253109d69118d599a7d..09ec6d75efaadd77df88a5a8f38f4f2bb8d03b3e 100755
--- a/tools/metrics/histograms/update_use_counter_feature_enum.py
+++ b/tools/metrics/histograms/update_use_counter_feature_enum.py
@@ -17,11 +17,8 @@ sys.path.append(os.path.join(os.path.dirname(__file__), '..', 'common'))
 from update_histogram_enum import ReadHistogramValues
 from update_histogram_enum import UpdateHistogramEnum
 
-USE_COUNTER_HEADER_PATH = \
-    '../../../third_party/WebKit/Source/core/frame/UseCounter.h'
 
-
-def print_enum_for_dashboard(enum_dict):
+def PrintEnumForDashboard(enum_dict):
   """Prints enum_items formatted for use in uma.py of Chromium dashboard."""
   for key in sorted(enum_dict.iterkeys()):
     print '  %d: \'%s\',' % (key, enum_dict[key])
@@ -36,16 +33,19 @@ if __name__ == '__main__':
                     'https://github.com/GoogleChrome/chromium-dashboard')
   options, args = parser.parse_args()
 
+  source_path = os.path.join(
+      '..', '..', '..',
+      'third_party', 'WebKit', 'Source', 'core', 'frame', 'UseCounter.h')
+
   START_MARKER = '^enum Feature {'
   END_MARKER = '^NumberOfFeatures'
 
   if options.dashboard:
-    enum_dict = ReadHistogramValues(
-        USE_COUNTER_HEADER_PATH, START_MARKER, END_MARKER)
-    print_enum_for_dashboard(enum_dict)
+    enum_dict = ReadHistogramValues(source_path, START_MARKER, END_MARKER)
+    PrintEnumForDashboard(enum_dict)
   else:
     UpdateHistogramEnum(
         histogram_enum_name='FeatureObserver',
-        source_enum_path=USE_COUNTER_HEADER_PATH,
+        source_enum_path=source_path,
         start_marker=START_MARKER,
         end_marker=END_MARKER)