Move ReadFileToString to the base namespace.

chrome/browser/renderer_host/pepper/device_id_fetcher.cc

 // Copyright (c) 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/renderer_host/pepper/device_id_fetcher.h"
 
 #include "base/file_util.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/string_number_conversions.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 150 matching lines @@
 // TODO(raymes): This is temporary code to migrate ChromeOS devices to the new
 // scheme for generating device IDs. Delete this once we are sure most ChromeOS
 // devices have been migrated.
 void DeviceIDFetcher::ComputeOnBlockingPool(const base::FilePath& profile_path,
                                             const std::string& salt) {
   std::string id;
   // First check if the legacy device ID file exists on ChromeOS. If it does, we
   // should just return that.
   base::FilePath id_path = GetLegacyDeviceIDPath(profile_path);
   if (base::PathExists(id_path)) {
-    if (file_util::ReadFileToString(id_path, &id) && !id.empty()) {
+    if (base::ReadFileToString(id_path, &id) && !id.empty()) {
       RunCallbackOnIOThread(id);
       return;
     }
   }
   // If we didn't find an ID, go back to the new code path to generate an ID.
   BrowserThread::PostTask(
       BrowserThread::IO, FROM_HERE,
       base::Bind(&DeviceIDFetcher::ComputeOnIOThread, this, salt));
 }
 
@@ skipping 18 matching lines @@
   chromeos::CryptohomeLibrary* c_home = chromeos::CryptohomeLibrary::Get();
   return c_home->GetSystemSalt();
 #else
   // Not implemented for other platforms.
   NOTREACHED();
   return "";
 #endif
 }
 
 }  // namespace chrome