Move ReadFileToString to the base namespace.

chrome/browser/media/webrtc_log_uploader.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 "chrome/browser/media/webrtc_log_uploader.h"
 
 #include "base/file_util.h"
 #include "base/files/file_path.h"
 #include "base/logging.h"
 #include "base/memory/shared_memory.h"
@@ skipping 209 matching lines @@
 void WebRtcLogUploader::DecreaseLogCount() {
   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
   --log_count_;
 }
 
 void WebRtcLogUploader::AddUploadedLogInfoToUploadListFile(
     const std::string& report_id) {
   std::string contents;
 
   if (base::PathExists(upload_list_path_)) {
-    bool read_ok = file_util::ReadFileToString(upload_list_path_, &contents);
+    bool read_ok = base::ReadFileToString(upload_list_path_, &contents);
     DPCHECK(read_ok);
 
     // Limit the number of log entries to |kLogListLimitLines| - 1, to make room
     // for the new entry. Each line including the last ends with a '\n', so hit
     // n will be before line n-1 (from the back).
     int lf_count = 0;
     int i = contents.size() - 1;
     for (; i >= 0 && lf_count < kLogListLimitLines; --i) {
       if (contents[i] == '\n')
         ++lf_count;
     }
     if (lf_count >= kLogListLimitLines) {
       // + 1 to compensate for the for loop decrease before the conditional
       // check and + 1 to get the length.
       contents.erase(0, i + 2);
     }
   }
 
   // Write the Unix time and report ID to the log list file.
   base::Time time_now = base::Time::Now();
   contents += base::DoubleToString(time_now.ToDoubleT()) +
               "," + report_id + '\n';
 
   int written = file_util::WriteFile(upload_list_path_, &contents[0],
                                      contents.size());
   DPCHECK(written == static_cast<int>(contents.size()));
 }