DevTools: improve DevTools file watcher to send added and removed paths

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 438 matching lines @@
   for (auto file_system_path : remaining) {
     delegate_->FileSystemRemoved(file_system_path);
     base::FilePath path = base::FilePath::FromUTF8Unsafe(file_system_path);
     BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE,
                             Bind(&DevToolsFileWatcher::RemoveWatch,
                                  base::Unretained(file_watcher_.get()), path));
   }
 }
 
 void DevToolsFileHelper::FilePathsChanged(
-    const std::vector<std::string>& paths) {
-  delegate_->FilePathsChanged(paths);
+    const std::vector<std::string>& changed_paths,
+    const std::vector<std::string>& added_paths,
+    const std::vector<std::string>& removed_paths) {
+  delegate_->FilePathsChanged(changed_paths, added_paths, removed_paths);
 }