Remove metrics collection from Kiosk Mode.

chrome/browser/chromeos/kiosk_mode/kiosk_mode_metrics.cc

-// Copyright (c) 2012 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 "chrome/browser/chromeos/kiosk_mode/kiosk_mode_metrics.h"
-
-#include "base/metrics/histogram.h"
-
-namespace {
-
-const char kDemoUserSessionTimeMetric[] = "KioskMode.DemoUserSessionTime";
-const char kDemoUserAppsLaunchedMetric[] = "KioskMode.DemoUserAppsLaunched";
-
-}
-
-namespace chromeos {
-
-static KioskModeMetrics* kiosk_mode_settings = NULL;
-
-// static
-KioskModeMetrics* KioskModeMetrics::Get() {
-  if (!kiosk_mode_settings)
-    kiosk_mode_settings = new KioskModeMetrics();
-
-  return kiosk_mode_settings;
-}
-
-void KioskModeMetrics::SessionStarted() {
-  session_started_ = base::Time::Now();
-}
-
-void KioskModeMetrics::SessionEnded() {
-  if (session_started_ == base::Time())
-    return;
-
-  // Session ended, time to report our collected metrics.
-  UMA_HISTOGRAM_LONG_TIMES(kDemoUserSessionTimeMetric,
-                           base::Time::Now() - session_started_);
-
-  UMA_HISTOGRAM_COUNTS(kDemoUserAppsLaunchedMetric, apps_opened_);
-
-  // We've consumed the session times, reset.
-  session_started_ = base::Time();
-}
-
-void KioskModeMetrics::UserOpenedApp() {
-  if (session_started_ == base::Time())
-    return;
-  ++apps_opened_;
-}
-
-KioskModeMetrics::KioskModeMetrics()
-    : session_started_(base::Time()),
-      apps_opened_(0) {
-}
-
-KioskModeMetrics::~KioskModeMetrics() {
-}
-
-}  // namespace chromeos