Move ReadFileToString to the base namespace.

chrome/browser/sxs_linux.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/sxs_linux.h"
 
 #include <vector>
 
 #include "base/logging.h"
 #include "base/file_util.h"
@@ skipping 40 matching lines @@
     // Rely on -Wswitch compiler warning to detect unhandled enum values.
   }
 
   base::FilePath channels_path(user_data_dir.AppendASCII("Channels"));
   std::vector<std::string> user_data_dir_channels;
 
   // Note: failure to read the channels file is not fatal. It's possible
   // and legitimate that it doesn't exist, e.g. for new profile or for profile
   // existing before channel marks have been introduced.
   std::string channels_contents;
-  if (file_util::ReadFileToString(channels_path, &channels_contents))
+  if (base::ReadFileToString(channels_path, &channels_contents))
     base::SplitString(channels_contents, '\n', &user_data_dir_channels);
 
   if (std::find(user_data_dir_channels.begin(),
                 user_data_dir_channels.end(),
                 product_channel_name) != user_data_dir_channels.end()) {
     // No need to do further disk writes if our channel mark is already present.
     return true;
   }
 
   user_data_dir_channels.push_back(product_channel_name);
@@ skipping 16 matching lines @@
   }
 
   if (!DoAddChannelMarkToUserDataDir(user_data_dir)) {
     LOG(ERROR) << "Failed to add channel mark to the user data dir ("
                << user_data_dir.value() << "). This profile will not be "
                << "automatically migrated for updated Linux packages.";
   }
 }
 
 }  // namespace sxs_linux