Move ReadFileToString to the base namespace.

chrome/common/extensions/api/storage/storage_schema_manifest_handler.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/common/extensions/api/storage/storage_schema_manifest_handler.h"
 
 #include <string>
 #include <vector>
 
 #include "base/file_util.h"
@@ skipping 34 matching lines @@
                                 kStorageManagedSchema);
     return scoped_ptr<policy::PolicySchema>();
   }
   file = extension->path().AppendASCII(path);
   if (!base::PathExists(file)) {
     *error =
         base::StringPrintf("File does not exist: %s", file.value().c_str());
     return scoped_ptr<policy::PolicySchema>();
   }
   std::string content;
-  if (!file_util::ReadFileToString(file, &content)) {
+  if (!base::ReadFileToString(file, &content)) {
     *error = base::StringPrintf("Can't read %s", file.value().c_str());
     return scoped_ptr<policy::PolicySchema>();
   }
   return policy::PolicySchema::Parse(content, error);
 }
 
 bool StorageSchemaManifestHandler::Parse(Extension* extension,
                                          string16* error) {
   std::string path;
   if (!extension->manifest()->GetString(kStorageManagedSchema, &path)) {
     *error = ASCIIToUTF16(
         base::StringPrintf("%s must be a string", kStorageManagedSchema));
     return false;
   }
   return true;
 }
 
 bool StorageSchemaManifestHandler::Validate(
     const Extension* extension,
     std::string* error,
     std::vector<InstallWarning>* warnings) const {
   return !!GetSchema(extension, error);
 }
 
 const std::vector<std::string> StorageSchemaManifestHandler::Keys() const {
   return SingleKey(kStorageManagedSchema);
 }
 
 }  // namespace extensions