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// Copyright 2014 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 "ui/aura/window_observer.h"
#include "base/logging.h"
#include "ui/aura/window.h"
namespace aura {
WindowObserver::WindowObserver() : observing_(0) {
}
WindowObserver::~WindowObserver() {
CHECK_EQ(0, observing_);
}
void WindowObserver::OnObservingWindow(aura::Window* window) {
if (!window->HasObserver(this))
observing_++;
}
void WindowObserver::OnUnobservingWindow(aura::Window* window) {
if (window->HasObserver(this))
observing_--;
}
} // namespace aura
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