Remove deprecated navigation callbacks on WebContentsObserver that are now unused.

content/browser/web_contents/web_contents_impl.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 CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_
 #define CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_
 
 #include <stdint.h>
 
 #include <functional>
@@ skipping 553 matching lines @@
   bool IsOverridingUserAgent() override;
   bool IsJavaScriptDialogShowing() const override;
   bool HideDownloadUI() const override;
 
   // NavigatorDelegate ---------------------------------------------------------
 
   void DidStartNavigation(NavigationHandle* navigation_handle) override;
   void DidRedirectNavigation(NavigationHandle* navigation_handle) override;
   void ReadyToCommitNavigation(NavigationHandle* navigation_handle) override;
   void DidFinishNavigation(NavigationHandle* navigation_handle) override;
-  void DidStartProvisionalLoad(RenderFrameHostImpl* render_frame_host,
-                               const GURL& validated_url,
-                               bool is_error_page) override;
-  void DidFailProvisionalLoadWithError(RenderFrameHostImpl* render_frame_host,
-                                       const GURL& validated_url,
-                                       int error_code,
-                                       const base::string16& error_description,
-                                       bool was_ignored_by_handler) override;
   void DidFailLoadWithError(RenderFrameHostImpl* render_frame_host,
                             const GURL& url,
                             int error_code,
                             const base::string16& error_description,
                             bool was_ignored_by_handler) override;
-  void DidCommitProvisionalLoad(RenderFrameHostImpl* render_frame_host,
-                                const GURL& url,
-                                ui::PageTransition transition_type) override;
   void DidNavigateMainFramePreCommit(bool navigation_is_within_page) override;
   void DidNavigateMainFramePostCommit(
       RenderFrameHostImpl* render_frame_host,
       const LoadCommittedDetails& details,
       const FrameHostMsg_DidCommitProvisionalLoad_Params& params) override;
   void DidNavigateAnyFramePostCommit(
       RenderFrameHostImpl* render_frame_host,
       const LoadCommittedDetails& details,
       const FrameHostMsg_DidCommitProvisionalLoad_Params& params) override;
   void SetMainFrameMimeType(const std::string& mime_type) override;
@@ skipping 919 matching lines @@
   // Adds/removes a callback called on creation of each new WebContents.
   static void AddCreatedCallbackForTesting(const CreatedCallback& callback);
   static void RemoveCreatedCallbackForTesting(const CreatedCallback& callback);
 
   DISALLOW_COPY_AND_ASSIGN(FriendZone);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_