Re-enable about:flags on Android

chrome/browser/lifetime/application_lifetime_android.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/lifetime/application_lifetime_android.h"
+
+#include <jni.h>
+
+#include "base/android/jni_android.h"
+#include "base/logging.h"
+#include "chrome/browser/browser_process.h"
+#include "chrome/browser/lifetime/application_lifetime.h"
+#include "chrome/browser/prefs/pref_service.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/ui/browser.h"
+#include "chrome/browser/ui/browser_list.h"
+#include "chrome/common/pref_names.h"
+#include "content/public/browser/browser_context.h"
+#include "jni/ApplicationLifetime_jni.h"
+
+namespace browser {
+
+void AttemptRestart() {
+  // Set the flag to restart Chrome after it is shutdown.
+  PrefService* pref_service = g_browser_process->local_state();
+  pref_service->SetBoolean(prefs::kRestartLastSessionOnShutdown, true);
+  AttemptExit();
+}
+
+void TerminateAndroid() {
+  bool restart = false;
+  PrefService* prefs = g_browser_process->local_state();
+  if (prefs->HasPrefPath(prefs::kRestartLastSessionOnShutdown)) {
+    restart = prefs->GetBoolean(prefs::kRestartLastSessionOnShutdown);
+    prefs->ClearPref(prefs::kRestartLastSessionOnShutdown);
+  }
+
+  JNIEnv* env = base::android::AttachCurrentThread();
+  Java_ApplicationLifetime_terminate(env, restart);
+}
+
+bool RegisterApplicationLifetimeAndroid(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}
+
+}  // namespace browser