Move ReadFileToString to the base namespace.

chrome/browser/chromeos/system_logs/debug_daemon_log_source.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/system_logs/debug_daemon_log_source.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/file_util.h"
 #include "base/logging.h"
@@ skipping 142 matching lines @@
     SystemLogsResponse* response) {
   for (size_t i = 0; i < last_used_profiles.size(); ++i) {
     std::string profile_prefix = "Profile[" + base::UintToString(i) + "] ";
     for (KeyValueMap::const_iterator it = user_log_files.begin();
          it != user_log_files.end();
          ++it) {
       std::string key = it->first;
       std::string value;
       std::string filename = it->second;
       base::FilePath profile_dir = last_used_profiles[i]->GetPath();
-      bool read_success = file_util::ReadFileToString(
+      bool read_success = base::ReadFileToString(
           profile_dir.Append(filename), &value);
 
       if (read_success && !value.empty())
         (*response)[profile_prefix + key] = value;
       else
         (*response)[profile_prefix + filename] = kNotAvailable;
     }
   }
 }
 
 void DebugDaemonLogSource::MergeResponse(SystemLogsResponse* response) {
   for (SystemLogsResponse::const_iterator it = response->begin();
        it != response->end(); ++it)
     response_->insert(*it);
   RequestCompleted();
 }
 
 void DebugDaemonLogSource::RequestCompleted() {
   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
   DCHECK(!callback_.is_null());
 
   --num_pending_requests_;
   if (num_pending_requests_ > 0)
     return;
   callback_.Run(response_.get());
 }
 
 }  // namespace chromeos