Switch views_perftests to histograms

Switches views_perftests to use PerfResultReporter instead of
PrintResult directly and whitelists it for conversion to histograms
before uploading to the perf dashboard.

Bug: 923564
Change-Id: I7e4b90b136aa554be6effa479e5d286f6f78e0e5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1797339
Auto-Submit: Brian Sheedy <bsheedy@chromium.org>
Commit-Queue: Allen Bauer <kylixrd@chromium.org>
Reviewed-by: Allen Bauer <kylixrd@chromium.org>
Cr-Commit-Position: refs/heads/master@{#695601}

tools/perf/process_perf_results.py

@@ -57,6 +57,7 @@ GTEST_CONVERSION_WHITELIST = [
   'cc_perftests',
   'gpu_perftests',
   'media_perftests',
+  'views_perftests',
   'xr.vr.common_perftests',
 ]
 

ui/views/controls/label_perftest.cc

@@ -6,7 +6,7 @@
 
 #include "base/strings/utf_string_conversions.h"
 #include "base/timer/lap_timer.h"
-#include "testing/perf/perf_test.h"
+#include "testing/perf/perf_result_reporter.h"
 #include "ui/views/test/views_test_base.h"
 
 namespace views {
@@ -34,8 +34,9 @@ TEST_F(LabelPerfTest, GetPreferredSize) {
     label.GetPreferredSize();
     timer.NextLap();
   }
-  perf_test::PrintResult("LabelPerfTest", std::string(), "GetPreferredSize",
-                         timer.LapsPerSecond(), "runs/s", true);
+  perf_test::PerfResultReporter reporter("LabelPerfTest", "GetPreferredSize");
+  reporter.RegisterImportantMetric("", "runs/s");
+  reporter.AddResult("", timer.LapsPerSecond());
 }
 
 }  // namespace views