Move ReadFileToString to the base namespace.

chrome/browser/nacl_host/test/nacl_gdb_browsertest.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/command_line.h"
 #include "base/environment.h"
 #include "base/file_util.h"
 #include "base/path_service.h"
 #include "base/win/windows_version.h"
 #include "chrome/common/chrome_switches.h"
@@ skipping 37 matching lines @@
     if (base::win::OSInfo::GetInstance()->wow64_status() ==
       base::win::OSInfo::WOW64_DISABLED) {
         return;
     }
 #endif
     EXPECT_TRUE(file_util::CreateTemporaryFile(&mock_nacl_gdb_file));
     env->SetVar("MOCK_NACL_GDB", mock_nacl_gdb_file.AsUTF8Unsafe());
     RunTestViaHTTP(test_name);
     env->UnSetVar("MOCK_NACL_GDB");
 
-    EXPECT_TRUE(file_util::ReadFileToString(mock_nacl_gdb_file, &content));
+    EXPECT_TRUE(base::ReadFileToString(mock_nacl_gdb_file, &content));
     EXPECT_STREQ("PASS", content.c_str());
     EXPECT_TRUE(base::DeleteFile(mock_nacl_gdb_file, false));
 
     content.clear();
-    EXPECT_TRUE(file_util::ReadFileToString(script_, &content));
+    EXPECT_TRUE(base::ReadFileToString(script_, &content));
     EXPECT_STREQ("PASS", content.c_str());
     EXPECT_TRUE(base::DeleteFile(script_, false));
   }
 
  private:
   base::FilePath script_;
 };
 
 // Fails on the ASAN test bot. See http://crbug.com/122219
 #if defined(ADDRESS_SANITIZER)
 #define MAYBE_Empty DISABLED_Empty
 #else
 #define MAYBE_Empty Empty
 #endif
 IN_PROC_BROWSER_TEST_F(NaClGdbTest, MAYBE_Empty) {
   RunWithNaClGdb("Empty");
 }