mac: Expose keychain access frequency to Telemetry.

tools/perf/measurements/skpicture_printer.py

Index: tools/perf/measurements/skpicture_printer.py
diff --git a/tools/perf/measurements/skpicture_printer.py b/tools/perf/measurements/skpicture_printer.py
index 687cf0cd4d7caa1cc73c5b7bdd7337ffa115ad06..afcb55d8898830ff15a10e12bca215312688eeda 100644
--- a/tools/perf/measurements/skpicture_printer.py
+++ b/tools/perf/measurements/skpicture_printer.py
@@ -4,6 +4,7 @@
 import glob
 import os
 
+from measurements import PageTestMeasurement
 from telemetry.page import page_test
 from telemetry.value import scalar
 
@@ -11,7 +12,7 @@ from telemetry.value import scalar
 _JS = 'chrome.gpuBenchmarking.printToSkPicture("{0}");'
 
 
-class SkpicturePrinter(page_test.PageTest):
+class SkpicturePrinter(PageTestMeasurement):
   @classmethod
   def AddCommandLineArgs(cls, parser):
     parser.add_option('-s', '--skp-outdir',
@@ -24,6 +25,7 @@ class SkpicturePrinter(page_test.PageTest):
     cls._skp_outdir = args.skp_outdir
 
   def CustomizeBrowserOptions(self, options):
+    super(SkpicturePrinter, self).CustomizeBrowserOptions(options)
     options.AppendExtraBrowserArgs(['--enable-gpu-benchmarking',
                                     '--no-sandbox',
                                     '--enable-deferred-image-decoding'])
@@ -41,3 +43,5 @@ class SkpicturePrinter(page_test.PageTest):
     pictures = glob.glob(os.path.join(outpath, '*.skp'))
     results.AddValue(scalar.ScalarValue(
         results.current_page, 'saved_picture_count', 'count', len(pictures)))
+
+    super(SkpicturePrinter, self).ValidateAndMeasurePage(page, tab, results)