Remove the EnableBenchmarking histogram.

This was introduced here http://src.chromium.org/viewvc/chrome?view=rev&revision=166280 and is no longer used.


Review URL: https://chromiumcodereview.appspot.com/13686007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@193119 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/chrome_browser_main.cc b/chrome/browser/chrome_browser_main.cc
index ddf00ea6..1918b32 100644
--- a/chrome/browser/chrome_browser_main.cc
+++ b/chrome/browser/chrome_browser_main.cc
@@ -675,18 +675,13 @@
 void ChromeBrowserMainParts::StartMetricsRecording() {
   MetricsService* metrics = g_browser_process->metrics_service();
 
-  const bool enable_benchmarking =
-      parsed_command_line_.HasSwitch(switches::kEnableBenchmarking);
-  // TODO(stevet): This is a temporary histogram used to investigate an issue
-  // with logging. Remove this when investigations are complete.
-  UMA_HISTOGRAM_BOOLEAN("UMA.FieldTrialsEnabledBenchmarking",
-                        enable_benchmarking);
   // TODO(miu): Metrics reporting is disabled in DEBUG builds until ill-fired
   // DCHECKs are fixed, and/or we reconsider whether metrics reporting should
   // really ever be enabled for debug builds.  http://crbug.com/156979
 #if defined(NDEBUG)
-  const bool only_do_metrics_recording = enable_benchmarking ||
-      parsed_command_line_.HasSwitch(switches::kMetricsRecordingOnly);
+  const bool only_do_metrics_recording =
+      parsed_command_line_.HasSwitch(switches::kMetricsRecordingOnly) ||
+      parsed_command_line_.HasSwitch(switches::kEnableBenchmarking);
 #else
   const bool only_do_metrics_recording = true;
 #endif