[Android WebView] Send WebChromeClient.onReceivedTitle when navigating back

android_webview/native/aw_web_contents_delegate.cc

 // 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.
 
 #include "android_webview/native/aw_web_contents_delegate.h"
 
 #include "android_webview/browser/aw_javascript_dialog_manager.h"
 #include "android_webview/browser/find_helper.h"
 #include "android_webview/native/aw_contents.h"
 #include "android_webview/native/aw_contents_io_thread_client_impl.h"
@@ skipping 186 matching lines @@
 
 void AwWebContentsDelegate::ActivateContents(WebContents* contents) {
   JNIEnv* env = AttachCurrentThread();
 
   ScopedJavaLocalRef<jobject> java_delegate = GetJavaDelegate(env);
   if (java_delegate.obj()) {
     Java_AwWebContentsDelegate_activateContents(env, java_delegate.obj());
   }
 }
 
+void AwWebContentsDelegate::LoadingStateChanged(WebContents* source,
+                                                bool to_different_document) {
+  // Page title may have changed, need to inform the embedder.
+  // |source| may be null if loading has started.
+  JNIEnv* env = AttachCurrentThread();
+
+  ScopedJavaLocalRef<jobject> java_delegate = GetJavaDelegate(env);
+  if (java_delegate.obj()) {
+    Java_AwWebContentsDelegate_loadingStateChanged(env, java_delegate.obj());
+  }
+}
+
 void AwWebContentsDelegate::RequestMediaAccessPermission(
     WebContents* web_contents,
     const content::MediaStreamRequest& request,
     const content::MediaResponseCallback& callback) {
   AwContents* aw_contents = AwContents::FromWebContents(web_contents);
   if (!aw_contents) {
     callback.Run(content::MediaStreamDevices(),
                  content::MEDIA_DEVICE_FAILED_DUE_TO_SHUTDOWN,
                  scoped_ptr<content::MediaStreamUI>().Pass());
     return;
@@ skipping 66 matching lines @@
   DVLOG(0) << "File Chooser result: mode = " << mode
            << ", file paths = " << JoinString(file_path_str, ":");
   rvh->FilesSelectedInChooser(files, mode);
 }
 
 bool RegisterAwWebContentsDelegate(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace android_webview