Extensions: Switch to new permission message system, part V

tools/metrics/histograms/update_extension_permission.py

Index: tools/metrics/histograms/update_extension_permission.py
diff --git a/tools/metrics/histograms/update_extension_permission.py b/tools/metrics/histograms/update_extension_permission.py
index 5c01fe5d4abd7c11c88f851299b8d447108ff20b..758b33b153293ccfa586ced0167ece2184562f63 100644
--- a/tools/metrics/histograms/update_extension_permission.py
+++ b/tools/metrics/histograms/update_extension_permission.py
@@ -2,8 +2,9 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-"""Updates ExtensionPermission2 enum in histograms.xml file with values read
-from permission_message.h.
+"""Updates ExtensionPermission2 and ExtensionPermission3 enums in histograms.xml
+file with values read from permission_message.h and api_permission.h,
+respectively.
 
 If the file was pretty-printed, the updated version is pretty-printed too.
 """
@@ -26,3 +27,11 @@ if __name__ == '__main__':
                                                     'permission_message.h'),
                       start_marker='^enum ID {',
                       end_marker='^kEnumBoundary')
+
+  UpdateHistogramEnum(histogram_enum_name='ExtensionPermission3',
+                      source_enum_path=os.path.join('..', '..', '..',
+                                                    'extensions', 'common',
+                                                    'permissions',
+                                                    'api_permission.h'),
+                      start_marker='^enum ID {',
+                      end_marker='^kEnumBoundary')