Re-enable about:flags on Android

chrome/browser/lifetime/application_lifetime_android.cc

Index: chrome/browser/lifetime/application_lifetime_android.cc
diff --git a/chrome/browser/lifetime/application_lifetime_android.cc b/chrome/browser/lifetime/application_lifetime_android.cc
new file mode 100644
index 0000000000000000000000000000000000000000..f385cd79f8ebe9e958d1228aad01a259db8524e9
--- /dev/null
+++ b/chrome/browser/lifetime/application_lifetime_android.cc
@@ -0,0 +1,46 @@
+// 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() {

[Nico, 2013/01/15 20:33:27]

Do you have any restart tests (since this code is very separate from the restart
code on other platforms)?

[gone, 2013/01/15 22:18:54]

Not yet.  Shutting down anything on Android is already a strange thing to be
doing, since you're supposed to let Android end your task whenever you feel like
it, but we need to do it to force the native Chromium library to be reloaded
with the new flags in effect.

I can add a bug to track the tests.

+  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