Move PathExists to base namespace.

chrome/browser/chromeos/drive/file_system_util_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 "chrome/browser/chromeos/drive/file_system_util.h"
 
 #include "base/file_util.h"
 #include "base/files/file_path.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/md5.h"
@@ skipping 188 matching lines @@
 
   // Put some files.
   ASSERT_TRUE(google_apis::test_util::WriteStringToFile(
       persistent_directory.AppendASCII("foo.abc"), "foo"));
   ASSERT_TRUE(google_apis::test_util::WriteStringToFile(
       tmp_directory.AppendASCII("bar.123"), "bar"));
 
   // Migrate.
   MigrateCacheFilesFromOldDirectories(temp_dir.path());
 
-  EXPECT_FALSE(file_util::PathExists(persistent_directory));
-  EXPECT_TRUE(file_util::PathExists(files_directory.AppendASCII("foo.abc")));
-  EXPECT_TRUE(file_util::PathExists(files_directory.AppendASCII("bar.123")));
+  EXPECT_FALSE(base::PathExists(persistent_directory));
+  EXPECT_TRUE(base::PathExists(files_directory.AppendASCII("foo.abc")));
+  EXPECT_TRUE(base::PathExists(files_directory.AppendASCII("bar.123")));
 }
 
 TEST(FileSystemUtilTest, NeedsNamespaceMigration) {
   // Not Drive cases.
   EXPECT_FALSE(NeedsNamespaceMigration(
       base::FilePath::FromUTF8Unsafe("/Downloads")));
   EXPECT_FALSE(NeedsNamespaceMigration(
       base::FilePath::FromUTF8Unsafe("/Downloads/x")));
   EXPECT_FALSE(NeedsNamespaceMigration(
       base::FilePath::FromUTF8Unsafe("/wherever/foo.txt")));
@@ skipping 109 matching lines @@
 
   base::FilePath path = temp_dir.path().AppendASCII("test.txt");
   const char kTestData[] = "abcdefghijklmnopqrstuvwxyz0123456789";
   ASSERT_TRUE(google_apis::test_util::WriteStringToFile(path, kTestData));
 
   EXPECT_EQ(base::MD5String(kTestData), GetMd5Digest(path));
 }
 
 }  // namespace util
 }  // namespace drive