Move PathExists to base namespace.

content/browser/web_contents/navigation_controller_impl_unittest.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 "base/basictypes.h"
 #include "base/bind.h"
 #include "base/file_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/path_service.h"
 #include "base/stl_util.h"
@@ skipping 3750 matching lines @@
         profile(), Profile::IMPLICIT_ACCESS);
     if (history) {
       history->SetOnBackendDestroyTask(base::MessageLoop::QuitClosure());
       base::MessageLoop::current()->Run();
     }
 
     // Do normal cleanup before deleting the profile directory below.
     NavigationControllerTest::TearDown();
 
     ASSERT_TRUE(base::Delete(test_dir_, true));
-    ASSERT_FALSE(file_util::PathExists(test_dir_));
+    ASSERT_FALSE(base::PathExists(test_dir_));
   }
 
   // Deletes the current profile manager and creates a new one. Indirectly this
   // shuts down the history database and reopens it.
   void ReopenDatabase() {
     session_helper_.set_service(NULL);
     SessionServiceFactory::SetForTestProfile(profile(), NULL);
 
     SessionService* service = new SessionService(profile());
     SessionServiceFactory::SetForTestProfile(profile(), service);
@@ skipping 102 matching lines @@
                     PAGE_TRANSITION_LINK);
   session_helper_.AssertNavigationEquals(nav,
                                          windows_[0]->tabs[0]->navigations[0]);
   nav.set_url(url2);
   session_helper_.AssertNavigationEquals(nav,
                                          windows_[0]->tabs[0]->navigations[1]);
 }
 */
 
 }  // namespace content