Move ReadFileToString to the base namespace.

chrome/test/chromedriver/chrome_launcher.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/test/chromedriver/chrome_launcher.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/base64.h"
@@ skipping 454 matching lines @@
       size) {
     return Status(kUnknownError, "cannot write file");
   }
   base::FilePath extension_dir = temp_dir.AppendASCII("extension_" + id);
   if (!zip::Unzip(extension_crx, extension_dir))
     return Status(kUnknownError, "cannot unzip");
 
   // Parse the manifest and set the 'key' if not already present.
   base::FilePath manifest_path(extension_dir.AppendASCII("manifest.json"));
   std::string manifest_data;
-  if (!file_util::ReadFileToString(manifest_path, &manifest_data))
+  if (!base::ReadFileToString(manifest_path, &manifest_data))
     return Status(kUnknownError, "cannot read manifest");
   scoped_ptr<base::Value> manifest_value(base::JSONReader::Read(manifest_data));
   base::DictionaryValue* manifest;
   if (!manifest_value || !manifest_value->GetAsDictionary(&manifest))
     return Status(kUnknownError, "invalid manifest");
   if (!manifest->HasKey("key")) {
     manifest->SetString("key", public_key_base64);
     base::JSONWriter::Write(manifest, &manifest_data);
     if (file_util::WriteFile(
             manifest_path, manifest_data.c_str(), manifest_data.size()) !=
@@ skipping 113 matching lines @@
   // Write empty "First Run" file, otherwise Chrome will wipe the default
   // profile that was written.
   if (file_util::WriteFile(
           user_data_dir.AppendASCII("First Run"), "", 0) != 0) {
     return Status(kUnknownError, "failed to write first run file");
   }
   return Status(kOk);
 }
 
 }  // namespace internal