[Mac] Adds a flag to force 10.6-style fullscreen for testing.

chrome/browser/ui/fullscreen/fullscreen_controller_interactive_browsertest.cc

 // 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.
 
 #include "build/build_config.h"
 #include "chrome/browser/content_settings/host_content_settings_map.h"
+#include "chrome/browser/fullscreen.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_commands.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/fullscreen/fullscreen_controller_test.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/test/base/interactive_test_utils.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/render_widget_host_view.h"
@@ skipping 363 matching lines @@
 
   {
     FullscreenNotificationObserver fullscreen_observer;
     chrome::ToggleFullscreenMode(browser());
     fullscreen_observer.Wait();
     EXPECT_FALSE(browser()->window()->IsFullscreen());
     EXPECT_FALSE(browser()->window()->IsFullscreenWithChrome());
     EXPECT_FALSE(browser()->window()->IsFullscreenWithoutChrome());
   }
 
-  if (base::mac::IsOSLionOrLater()) {
+  if (chrome::mac::SupportsSystemFullscreen()) {
     // Test that tab fullscreen mode doesn't make presentation mode the default
     // on Lion.
     FullscreenNotificationObserver fullscreen_observer;
     chrome::ToggleFullscreenMode(browser());
     fullscreen_observer.Wait();
     EXPECT_TRUE(browser()->window()->IsFullscreen());
     EXPECT_TRUE(browser()->window()->IsFullscreenWithChrome());
     EXPECT_FALSE(browser()->window()->IsFullscreenWithoutChrome());
   }
 }
@@ skipping 474 matching lines @@
 
   GURL url = test_server()->GetURL("simple.html");
   AddTabAtIndex(0, url, PAGE_TRANSITION_TYPED);
 
   // Validate that going fullscreen for a URL defaults to asking permision.
   ASSERT_FALSE(IsFullscreenPermissionRequested());
   ASSERT_NO_FATAL_FAILURE(ToggleTabFullscreenNoRetries(true));
   ASSERT_TRUE(IsFullscreenPermissionRequested());
   ASSERT_NO_FATAL_FAILURE(ToggleTabFullscreenNoRetries(false));
 }