Move ReadFileToString to the base namespace.

chrome/test/webdriver/webdriver_logging.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/test/webdriver/webdriver_logging.h"
 
 #include <cmath>
 
 #include "base/file_util.h"
 #include "base/files/file_path.h"
@@ skipping 148 matching lines @@
 #endif
 
   base::AutoLock auto_lock(lock_);
   fprintf(file_.get(), "%s", entry.c_str());
   fflush(file_.get());
 }
 
 bool FileLog::GetLogContents(std::string* contents) const {
   if (!file_.get())
     return false;
-  return file_util::ReadFileToString(path_, contents);
+  return base::ReadFileToString(path_, contents);
 }
 
 bool FileLog::IsOpen() const {
   return !!file_.get();
 }
 
 void FileLog::set_min_log_level(LogLevel level) {
   min_log_level_ = level;
 }
 
@@ skipping 65 matching lines @@
     log = FileLog::CreateFileLog(FILE_PATH_LITERAL("chromedriver.log"),
                                  min_log_level);
   } else {
     log = new FileLog(log_path, min_log_level);
   }
   FileLog::SetGlobalLog(log);
   return log->IsOpen();
 }
 
 }  // namespace webdriver