Record Pin Printing usage

Bug: 848942
Change-Id: Ibfb613229cc004c64d98ccf58d37c34d566a0be7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1662453Reviewed-by: Rebekah Potter <rbpotter@chromium.org>
Reviewed-by: Sean Kau <skau@chromium.org>
Commit-Queue: Nikita Podguzov <nikitapodguzov@google.com>
Cr-Commit-Position: refs/heads/master@{#669978}

chrome/browser/ui/webui/print_preview/print_preview_handler.cc

@@ -144,6 +144,7 @@ enum PrintSettingsBuckets {
   FIT_TO_PAGE,
   DEFAULT_DPI,
   NON_DEFAULT_DPI,
+  PIN,
   PRINT_SETTINGS_BUCKET_BOUNDARY
 };
 
@@ -401,6 +402,11 @@ void ReportPrintSettingsStats(const base::Value& print_settings,
                                                          : NON_DEFAULT_DPI);
     }
   }
+
+#if defined(OS_CHROMEOS)
+  if (print_settings.FindStringKey(kSettingPinValue))
+    ReportPrintSettingHistogram(PIN);
+#endif  // defined(OS_CHROMEOS)
 }
 
 UserActionBuckets DetermineUserAction(const base::Value& settings) {

tools/metrics/histograms/enums.xml

@@ -47779,6 +47779,7 @@ Called by update_net_trust_anchors.py.-->
   <int value="21" label="FIT_TO_PAGE"/>
   <int value="22" label="DEFAULT_DPI"/>
   <int value="23" label="NON_DEFAULT_DPI"/>
+  <int value="24" label="PIN"/>
 </enum>
 
 <enum name="PrivetNotificationsEvent">