Refactor AppendToFile and WriteFileDescriptor

chrome/browser/devtools/devtools_file_helper.cc

 // Copyright (c) 2012 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/devtools/devtools_file_helper.h"
 
 #include <set>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 110 matching lines @@
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
   DCHECK(!path.empty());
 
   base::WriteFile(path, content.c_str(), content.length());
 }
 
 void AppendToFile(const base::FilePath& path, const std::string& content) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
   DCHECK(!path.empty());
 
-  base::AppendToFile(path, content.c_str(), content.length());
+  base::AppendToFile(path, content.c_str(), content.size());
 }
 
 storage::IsolatedContext* isolated_context() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   storage::IsolatedContext* isolated_context =
       storage::IsolatedContext::GetInstance();
   DCHECK(isolated_context);
   return isolated_context;
 }
 
@@ skipping 277 matching lines @@
   base::DictionaryValue* file_systems_paths_value = update.Get();
   file_systems_paths_value->RemoveWithoutPathExpansion(file_system_path, NULL);
 }
 
 bool DevToolsFileHelper::IsFileSystemAdded(
     const std::string& file_system_path) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   set<std::string> file_system_paths = GetAddedFileSystemPaths(profile_);
   return file_system_paths.find(file_system_path) != file_system_paths.end();
 }