DevTools: allow storing devtools preferences on the browser side.

chrome/browser/devtools/devtools_embedder_message_dispatcher.h

 // 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.
 
 #ifndef CHROME_BROWSER_DEVTOOLS_DEVTOOLS_EMBEDDER_MESSAGE_DISPATCHER_H_
 #define CHROME_BROWSER_DEVTOOLS_DEVTOOLS_EMBEDDER_MESSAGE_DISPATCHER_H_
 
 #include <map>
 #include <string>
 
@@ skipping 48 matching lines @@
                                      const std::string& headers,
                                      int stream_id) = 0;
     virtual void SearchInPath(int search_request_id,
                               const std::string& file_system_path,
                               const std::string& query) = 0;
     virtual void SetWhitelistedShortcuts(const std::string& message) = 0;
     virtual void ZoomIn() = 0;
     virtual void ZoomOut() = 0;
     virtual void ResetZoom() = 0;
     virtual void SetDevicesUpdatesEnabled(bool enabled) = 0;
+    virtual void GetPreferences(const DispatchCallback& callback) = 0;
+    virtual void SetPreference(const std::string& name,
+                               const std::string& value) = 0;
+    virtual void RemovePreference(const std::string& name) = 0;
+    virtual void ClearPreferences() = 0;
     virtual void SendMessageToBrowser(const std::string& message) = 0;
     virtual void RecordEnumeratedHistogram(const std::string& name,
                                            int sample,
                                            int boundary_value) = 0;
     virtual void SendJsonRequest(const DispatchCallback& callback,
                                  const std::string& browser_id,
                                  const std::string& url) = 0;
   };
 
   using DispatchCallback = Delegate::DispatchCallback;
 
   virtual ~DevToolsEmbedderMessageDispatcher() {}
   virtual bool Dispatch(const DispatchCallback& callback,
                         const std::string& method,
                         const base::ListValue* params) = 0;
 
   static DevToolsEmbedderMessageDispatcher* CreateForDevToolsFrontend(
       Delegate* delegate);
 };
 
 #endif  // CHROME_BROWSER_DEVTOOLS_DEVTOOLS_EMBEDDER_MESSAGE_DISPATCHER_H_