Rewrite std::string("") to std::string(), Linux edition.

webkit/fileapi/syncable/canned_syncable_file_system.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 "webkit/fileapi/syncable/canned_syncable_file_system.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/file_util.h"
 #include "base/message_loop_proxy.h"
@@ skipping 427 matching lines @@
     const FileSystemURL& url) {
   return RunOnThread(
       file_task_runner_,
       FROM_HERE,
       base::Bind(&LocalFileChangeTracker::ClearChangesForURL,
                  base::Unretained(file_system_context_->change_tracker()),
                  url));
 }
 
 FileSystemOperation* CannedSyncableFileSystem::NewOperation() {
-  return file_system_context_->CreateFileSystemOperation(URL(""), NULL);
+  return file_system_context_->CreateFileSystemOperation(URL(std::string()),
+                                                         NULL);
 }
 
 void CannedSyncableFileSystem::OnSyncEnabled(const FileSystemURL& url) {
   sync_status_observers_->Notify(&LocalFileSyncStatus::Observer::OnSyncEnabled,
                                  url);
 }
 
 void CannedSyncableFileSystem::OnWriteEnabled(const FileSystemURL& url) {
   sync_status_observers_->Notify(&LocalFileSyncStatus::Observer::OnWriteEnabled,
                                  url);
@@ skipping 138 matching lines @@
   sync_status_ = status;
   MessageLoop::current()->Quit();
 }
 
 void CannedSyncableFileSystem::InitializeSyncStatusObserver() {
   ASSERT_TRUE(io_task_runner_->RunsTasksOnCurrentThread());
   file_system_context_->sync_context()->sync_status()->AddObserver(this);
 }
 
 }  // namespace sync_file_system