Move ReadFileToString to the base namespace.

sandbox/win/src/handle_inheritance_test.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 <stdio.h>
 
 #include "base/file_util.h"
 #include "base/win/windows_version.h"
 #include "sandbox/win/tests/common/controller.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 22 matching lines @@
       &attrs, OPEN_EXISTING, 0, NULL);
   EXPECT_NE(file_handle, INVALID_HANDLE_VALUE);
 
   TestRunner runner;
   EXPECT_EQ(SBOX_ALL_OK, runner.GetPolicy()->SetStdoutHandle(file_handle));
   int result = runner.RunTest(L"HandleInheritanceTests_PrintToStdout");
   EXPECT_EQ(SBOX_TEST_SUCCEEDED, result);
   EXPECT_TRUE(::CloseHandle(file_handle));
 
   std::string data;
-  EXPECT_TRUE(file_util::ReadFileToString(base::FilePath(temp_file_name),
-                                          &data));
+  EXPECT_TRUE(base::ReadFileToString(base::FilePath(temp_file_name), &data));
   // Redirection uses a feature that was added in Windows Vista.
   if (base::win::GetVersion() >= base::win::VERSION_VISTA) {
     EXPECT_EQ("Example output to stdout\r\n", data);
   } else {
     EXPECT_EQ("", data);
   }
 
   EXPECT_TRUE(::DeleteFile(temp_file_name));
 }
 
 }