Added UMA metrics for screen capture UI in the status area.

ash/common/system/chromeos/screen_security/screen_capture_tray_item.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/common/system/chromeos/screen_security/screen_capture_tray_item.h"
 
 #include <utility>
 
+#include "ash/common/metrics/user_metrics_action.h"
 #include "ash/common/system/system_notifier.h"
 #include "ash/common/system/tray/system_tray_notifier.h"
 #include "ash/common/wm_shell.h"
 #include "grit/ash_resources.h"
 #include "grit/ash_strings.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/message_center/message_center.h"
 #include "ui/message_center/notification.h"
 
@@ skipping 44 matching lines @@
       data, new tray::ScreenNotificationDelegate(this)));
   notification->SetSystemPriority();
   message_center::MessageCenter::Get()->AddNotification(
       std::move(notification));
 }
 
 std::string ScreenCaptureTrayItem::GetNotificationId() {
   return kScreenCaptureNotificationId;
 }
 
+void ScreenCaptureTrayItem::RecordStoppedFromDefaultViewMetric() {
+  WmShell::Get()->RecordUserMetricsAction(
+      UMA_STATUS_AREA_SCREEN_CAPTURE_DEFAULT_STOP);
+}
+
+void ScreenCaptureTrayItem::RecordStoppedFromNotificationViewMetric() {
+  WmShell::Get()->RecordUserMetricsAction(
+      UMA_STATUS_AREA_SCREEN_CAPTURE_NOTIFICATION_STOP);
+}
+
 void ScreenCaptureTrayItem::OnScreenCaptureStart(
     const base::Closure& stop_callback,
     const base::string16& screen_capture_status) {
   screen_capture_status_ = screen_capture_status;
 
   // We do not want to show the screen capture tray item and the chromecast
   // casting tray item at the same time. We will hide this tray item.
   //
   // This suppression technique is currently dependent on the order
   // that OnScreenCaptureStart and OnCastingSessionStartedOrStopped
@@ skipping 10 matching lines @@
   // screen capture is stopped externally.
   set_is_started(false);
   Update();
 }
 
 void ScreenCaptureTrayItem::OnCastingSessionStartedOrStopped(bool started) {
   is_casting_ = started;
 }
 
 }  // namespace ash