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

chrome/browser/devtools/devtools_file_helper.h

 // 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.
 
 #ifndef CHROME_BROWSER_DEVTOOLS_DEVTOOLS_FILE_HELPER_H_
 #define CHROME_BROWSER_DEVTOOLS_DEVTOOLS_FILE_HELPER_H_
 
 #include <map>
 #include <memory>
 #include <set>
@@ skipping 29 matching lines @@
     std::string file_system_name;
     std::string root_url;
     std::string file_system_path;
   };
 
   class Delegate {
    public:
     virtual ~Delegate() {}
     virtual void FileSystemAdded(const FileSystem& file_system) = 0;
     virtual void FileSystemRemoved(const std::string& file_system_path) = 0;
-    virtual void FilePathsChanged(const std::vector<std::string>& paths) = 0;
+    virtual void FilePathsChanged(
+        const std::vector<std::string>& changed_paths,
+        const std::vector<std::string>& added_paths,
+        const std::vector<std::string>& removed_paths) = 0;
   };
 
   DevToolsFileHelper(content::WebContents* web_contents, Profile* profile,
                      Delegate* delegate);
   ~DevToolsFileHelper();
 
   typedef base::Callback<void(void)> SaveCallback;
   typedef base::Callback<void(void)> AppendCallback;
   typedef base::Callback<void(const base::string16&,
                               const base::Callback<void(bool)>&)>
@@ skipping 64 matching lines @@
   void InnerAddFileSystem(
       const ShowInfoBarCallback& show_info_bar_callback,
       const base::FilePath& path);
   void CheckProjectFileExistsAndAddFileSystem(
       const ShowInfoBarCallback& show_info_bar_callback,
       const base::FilePath& path);
   void AddUserConfirmedFileSystem(
       const base::FilePath& path,
       bool allowed);
   void FileSystemPathsSettingChanged();
-  void FilePathsChanged(const std::vector<std::string>& paths);
+  void FilePathsChanged(const std::vector<std::string>& changed_paths,
+                        const std::vector<std::string>& added_paths,
+                        const std::vector<std::string>& removed_paths);
 
   content::WebContents* web_contents_;
   Profile* profile_;
   DevToolsFileHelper::Delegate* delegate_;
   typedef std::map<std::string, base::FilePath> PathsMap;
   PathsMap saved_files_;
   PrefChangeRegistrar pref_change_registrar_;
   std::set<std::string> file_system_paths_;
   std::unique_ptr<DevToolsFileWatcher> file_watcher_;
   base::WeakPtrFactory<DevToolsFileHelper> weak_factory_;
   DISALLOW_COPY_AND_ASSIGN(DevToolsFileHelper);
 };
 
 #endif  // CHROME_BROWSER_DEVTOOLS_DEVTOOLS_FILE_HELPER_H_