[Refactor] Move the non-browser specific logic of ImmersiveModeControllerAsh into ash part 2

ash/wm/immersive_revealed_lock.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/wm/immersive_revealed_lock.h"
+
+namespace ash {
+
+ImmersiveRevealedLock::ImmersiveRevealedLock(
+    const base::WeakPtr<Delegate>& delegate,
+    Delegate::AnimateReveal animate_reveal)
+    : delegate_(delegate) {
+  delegate_->LockRevealedState(animate_reveal);
+}
+
+ImmersiveRevealedLock::~ImmersiveRevealedLock() {
+  if (delegate_)
+    delegate_->UnlockRevealedState();
+}
+
+}  // namespace ash