Move PathIsWritable, DirectoryExists, ContentsEqual, and TextContentsEqual to the base namespace.

chrome/browser/component_updater/test/component_patcher_unittest.cc

 // Copyright 2013 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/compiler_specific.h"
 #include "base/file_util.h"
 #include "base/files/file_path.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/path_service.h"
 #include "base/values.h"
@@ skipping 67 matching lines @@
   scoped_ptr<DeltaUpdateOp> op(new DeltaUpdateOpCreate());
   ComponentUnpacker::Error result = op->Run(command_args.get(),
                                      input_dir_.path(),
                                      unpack_dir_.path(),
                                      patcher_.get(),
                                      NULL,
                                      &error);
 
   EXPECT_EQ(ComponentUnpacker::kNone, result);
   EXPECT_EQ(0, error);
-  EXPECT_TRUE(file_util::ContentsEqual(
+  EXPECT_TRUE(base::ContentsEqual(
       unpack_dir_.path().Append(FILE_PATH_LITERAL("output.bin")),
       test_file("binary_output.bin")));
 }
 
 // Verify that a 'copy' delta update operation works correctly.
 TEST_F(ComponentPatcherOperationTest, CheckCopyOperation) {
   EXPECT_TRUE(base::CopyFile(
       test_file("binary_output.bin"),
       installed_dir_.path().Append(FILE_PATH_LITERAL("binary_output.bin"))));
 
   scoped_ptr<base::DictionaryValue> command_args(new base::DictionaryValue());
   command_args->SetString("output", "output.bin");
   command_args->SetString("sha256", binary_output_hash);
   command_args->SetString("op", "copy");
   command_args->SetString("input", "binary_output.bin");
 
   int error = 0;
   scoped_ptr<DeltaUpdateOp> op(new DeltaUpdateOpCopy());
   ComponentUnpacker::Error result = op->Run(command_args.get(),
                                      input_dir_.path(),
                                      unpack_dir_.path(),
                                      patcher_.get(),
                                      installer_.get(),
                                      &error);
   EXPECT_EQ(ComponentUnpacker::kNone, result);
   EXPECT_EQ(0, error);
-  EXPECT_TRUE(file_util::ContentsEqual(
+  EXPECT_TRUE(base::ContentsEqual(
       unpack_dir_.path().Append(FILE_PATH_LITERAL("output.bin")),
       test_file("binary_output.bin")));
 }