Implement pepper flash fullscreen on Mac

ui/base/cocoa/fullscreen_window_manager_unittest.mm

+// 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.
+
+#import "ui/base/cocoa/fullscreen_window_manager.h"
+
+
+#include "testing/gtest/include/gtest/gtest.h"
+#include "testing/platform_test.h"
+#import "ui/base/test/ui_cocoa_test_helper.h"
+
+typedef ui::CocoaTest FullscreenWindowManagerTest;
+
+TEST_F(FullscreenWindowManagerTest, EnterExit) {
+  scoped_nsobject<FullscreenWindowManager> manager(
+      [[FullscreenWindowManager alloc]
+          initWithWindow:test_window()
+           desiredScreen:[NSScreen mainScreen]]);
+
+  SystemUIMode mode = kUIModeNormal;
+  GetSystemUIMode(&mode, NULL);
+  EXPECT_EQ(kUIModeNormal, mode);
+
+  [manager enterFullscreenMode];
+  GetSystemUIMode(&mode, NULL);
+  EXPECT_EQ(kUIModeAllHidden, mode);
+
+  [manager exitFullscreenMode];
+  GetSystemUIMode(&mode, NULL);
+  EXPECT_EQ(kUIModeNormal, mode);
+}