Refactor PanelManager to create PanelStrip.

chrome/browser/ui/panels/test_panel_mouse_watcher.cc

+// Copyright (c) 2011 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/ui/panels/test_panel_mouse_watcher.h"
+
+#include "testing/gtest/include/gtest/gtest.h"
+
+TestPanelMouseWatcher::TestPanelMouseWatcher()
+    : started_(false) {
+}
+
+TestPanelMouseWatcher::~TestPanelMouseWatcher() {
+  EXPECT_FALSE(IsActive());
+}
+
+void TestPanelMouseWatcher::Start() {
+  EXPECT_FALSE(IsActive());
+  started_ = true;
+}
+
+void TestPanelMouseWatcher::Stop() {
+  EXPECT_TRUE(IsActive());
+  started_ = false;
+}
+
+bool TestPanelMouseWatcher::IsActive() const {
+  return started_;
+}