Move PathExists to base namespace.

chrome/browser/history/top_sites_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/bind.h"
 #include "base/bind_helpers.h"
 #include "base/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/format_macros.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 892 matching lines @@
   EXPECT_TRUE(IsTopSitesLoaded());
 
   // Make sure the data was migrated to top sites.
   ASSERT_NO_FATAL_FAILURE(MigrationAssertions());
 
   // We need to wait for top sites and history to finish processing requests.
   WaitForTopSites();
   WaitForHistory();
 
   // Make sure there is no longer a Thumbnails file on disk.
-  ASSERT_FALSE(file_util::PathExists(
+  ASSERT_FALSE(base::PathExists(
                    profile()->GetPath().Append(chrome::kThumbnailsFilename)));
 
   // Recreate top sites and make sure everything is still there.
   profile()->CreateHistoryService(false, false);
   RecreateTopSitesAndBlock();
 
   ASSERT_NO_FATAL_FAILURE(MigrationAssertions());
 }
 
 // Verifies that callbacks are notified correctly if requested before top sites
@@ skipping 334 matching lines @@
       chrome::NOTIFICATION_TOP_SITES_LOADED,
       content::Source<Profile>(profile()));
   profile()->CreateTopSites();
   HistoryServiceFactory::GetForProfile(
       profile(), Profile::EXPLICIT_ACCESS)->UnloadBackend();
   profile()->BlockUntilHistoryProcessesPendingRequests();
   observer.Wait();
 }
 
 }  // namespace history