Support undoing offline page deletion

chrome/browser/android/offline_pages/offline_page_bridge.cc

Index: chrome/browser/android/offline_pages/offline_page_bridge.cc
diff --git a/chrome/browser/android/offline_pages/offline_page_bridge.cc b/chrome/browser/android/offline_pages/offline_page_bridge.cc
index 5a03f9c9824f8995e4b855c6c8aa2b13b87bbf74..d621b06f8e699aad7f77ec6d2efe8b43a3c86643 100644
--- a/chrome/browser/android/offline_pages/offline_page_bridge.cc
+++ b/chrome/browser/android/offline_pages/offline_page_bridge.cc
@@ -94,6 +94,15 @@ void OfflinePageBridge::OfflinePageModelLoaded(OfflinePageModel* model) {
   NotifyIfDoneLoading();
 }
 
+void OfflinePageBridge::OfflinePageModelChanged(OfflinePageModel* model) {
+  DCHECK_EQ(offline_page_model_, model);
+  JNIEnv* env = base::android::AttachCurrentThread();
+  ScopedJavaLocalRef<jobject> obj = weak_java_ref_.get(env);
+  if (obj.is_null())
+    return;
+  Java_OfflinePageBridge_offlinePageModelChanged(env, obj.obj());
+}
+
 void OfflinePageBridge::GetAllPages(JNIEnv* env,
                                     jobject obj,
                                     jobject j_result_obj) {