Pass NavigationContext to WebStateImpl::OnNavigationStarted.

ios/web/web_state/web_state_impl.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 IOS_WEB_WEB_STATE_WEB_STATE_IMPL_H_
 #define IOS_WEB_WEB_STATE_WEB_STATE_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 55 matching lines @@
   // Constructor for WebStateImpls created for new sessions.
   WebStateImpl(const CreateParams& params);
   // Constructor for WebStatesImpls created for deserialized sessions
   WebStateImpl(const CreateParams& params, CRWSessionStorage* session_storage);
   ~WebStateImpl() override;
 
   // Gets/Sets the CRWWebController that backs this object.
   CRWWebController* GetWebController();
   void SetWebController(CRWWebController* web_controller);
 
-  // Notifies the observers that a provisional navigation has started.
-  void OnProvisionalNavigationStarted(const GURL& url);
+  // Notifies the observers that a navigation has started.
+  void OnNavigationStarted(web::NavigationContext* context);
 
-  // Called when a navigation is finished.
+  // Notifies the observers that a navigation has finished.
   void OnNavigationFinished(web::NavigationContext* context);
 
   // Called when page title was changed.
   void OnTitleChanged();
 
   // Called when the visible security state of the page changes.
   void OnVisibleSecurityStateChange();
 
   // Called when a dialog or child window open request was suppressed.
   void OnDialogSuppressed();
@@ skipping 258 matching lines @@
 
   // Mojo interface registry for this WebState.
   std::unique_ptr<WebStateInterfaceProvider> web_state_interface_provider_;
 
   DISALLOW_COPY_AND_ASSIGN(WebStateImpl);
 };
 
 }  // namespace web
 
 #endif  // IOS_WEB_WEB_STATE_WEB_STATE_IMPL_H_