[Android WebView] Send WebChromeClient.onReceivedTitle when navigating back

android_webview/native/aw_web_contents_delegate.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 ANDROID_WEBVIEW_NATIVE_AW_WEB_CONTENTS_DELEGATE_H_
 #define ANDROID_WEBVIEW_NATIVE_AW_WEB_CONTENTS_DELEGATE_H_
 
 #include <jni.h>
 
 #include "components/web_contents_delegate_android/web_contents_delegate_android.h"
@@ skipping 32 matching lines @@
   void NavigationStateChanged(content::WebContents* source,
                               content::InvalidateTypes changed_flags) override;
   void WebContentsCreated(content::WebContents* source_contents,
                           int opener_render_frame_id,
                           const base::string16& frame_name,
                           const GURL& target_url,
                           content::WebContents* new_contents) override;
 
   void CloseContents(content::WebContents* source) override;
   void ActivateContents(content::WebContents* contents) override;
+  void LoadingStateChanged(content::WebContents* source,
+                           bool to_different_document) override;
   void RequestMediaAccessPermission(
       content::WebContents* web_contents,
       const content::MediaStreamRequest& request,
       const content::MediaResponseCallback& callback) override;
   void EnterFullscreenModeForTab(content::WebContents* web_contents,
                                  const GURL& origin) override;
   void ExitFullscreenModeForTab(content::WebContents* web_contents) override;
   bool IsFullscreenForTabOrPending(
       const content::WebContents* web_contents) const override;
 
  private:
   bool is_fullscreen_;
 };
 
 bool RegisterAwWebContentsDelegate(JNIEnv* env);
 
 }  // namespace android_webview
 
 #endif  // ANDROID_WEBVIEW_NATIVE_AW_WEB_CONTENTS_DELEGATE_H_