Re-enable about:flags on Android

chrome/android/java/src/org/chromium/chrome/browser/ApplicationLifetime.java

Index: chrome/android/java/src/org/chromium/chrome/browser/ApplicationLifetime.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ApplicationLifetime.java b/chrome/android/java/src/org/chromium/chrome/browser/ApplicationLifetime.java
new file mode 100644
index 0000000000000000000000000000000000000000..46f1ebc8bd8c9329ba01ab4453791e775d034812
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ApplicationLifetime.java
@@ -0,0 +1,39 @@
+// 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.
+
+package org.chromium.chrome.browser;
+
+import org.chromium.base.CalledByNative;
+
+/**
+ * Watches for when Chrome is told to restart itself.
+ */
+public class ApplicationLifetime {
+    public interface Observer {
+        void onTerminate(boolean restart);
+    }
+    private static Observer sObserver = null;
+
+    /**
+     * Sets the observer that monitors for ApplicationLifecycle events.
+     * We only allow one observer to be set to avoid race conditions for shutdown events.
+     */
+    public static void setObserver(Observer observer) {
+        assert sObserver == null;
+        sObserver = observer;
+    }
+
+    /**
+     * Removes whatever observer is currently watching this class.
+     */
+    public static void removeObserver() {
+        sObserver = null;
+    }
+
+    @CalledByNative
+    public static void terminate(boolean restart) {
+        if (sObserver != null)
+            sObserver.onTerminate(restart);
+    }
+}