[ios] Removed unused CRWWebControllerObserver methods.

ios/web/web_state/web_controller_observer_bridge.h

 // Copyright 2014 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 IOS_WEB_WEB_STATE_WEB_CONTROLLER_OBSERVER_BRIDGE_H_
 #define IOS_WEB_WEB_STATE_WEB_CONTROLLER_OBSERVER_BRIDGE_H_
 
-#include <string>
-
 #import "base/ios/weak_nsobject.h"
 #include "base/macros.h"
 #include "ios/web/public/web_state/web_state_observer.h"
 
 @class CRWWebController;
 @protocol CRWWebControllerObserver;
-class GURL;
-
-namespace base {
-class DictionaryValue;
-}
 
 namespace web {
 
 class WebState;
 
 // This class allows to register a CRWWebControllerObserver instance as
 // a WebStateObserver.
 // It listens to WebStateObserver calls and forwards them to the underlying
 // CRWWebControllerObserver.
 // TODO(droger): Remove this class once all CRWWebControllerObserver have been
@@ skipping 11 matching lines @@
 
   // Gets the underlying CRWWebControllerObserver.
   id<CRWWebControllerObserver> web_controller_observer() const {
     return web_controller_observer_;
   }
 
  private:
   // WebStateObserver implementation.
   void PageLoaded(PageLoadCompletionStatus load_completion_status) override;
 
-  // Callback for script commands.
-  bool ScriptCommandReceived(const base::DictionaryValue& value,
-                             const GURL& url,
-                             bool user_is_interacting);
-
   base::WeakNSProtocol<id<CRWWebControllerObserver>> web_controller_observer_;
   base::WeakNSObject<CRWWebController> web_controller_;
-  std::string script_command_callback_prefix_;
 
   DISALLOW_COPY_AND_ASSIGN(WebControllerObserverBridge);
 };
 
 }  // namespace web
 
 #endif  // IOS_WEB_WEB_STATE_WEB_CONTROLLER_OBSERVER_BRIDGE_H_