[Offline pages] Adapting OfflinePageDownloadBridge to DownloadUIAdapter

chrome/browser/android/offline_pages/downloads/offline_page_download_bridge.h

 // Copyright 2016 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 CHROME_BROWSER_ANDROID_OFFLINE_PAGES_DOWNLOADS_OFFLINE_PAGE_DOWNLOAD_BRIDGE_H_
 #define CHROME_BROWSER_ANDROID_OFFLINE_PAGES_DOWNLOADS_OFFLINE_PAGE_DOWNLOAD_BRIDGE_H_
 
 #include <stdint.h>
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_weak_ref.h"
 #include "base/macros.h"
 #include "base/supports_user_data.h"
-#include "components/offline_pages/offline_page_item.h"
-#include "components/offline_pages/offline_page_model.h"
+#include "components/offline_pages/downloads/download_ui_adapter.h"
 
 namespace content {
 class BrowserContext;
 }
 
 namespace offline_pages {
 namespace android {
 
 /**
  * Bridge between C++ and Java for exposing native implementation of offline
  * pages model in managed code.
  */
-class OfflinePageDownloadBridge {
+class OfflinePageDownloadBridge : public DownloadUIAdapter::Observer {
  public:
   OfflinePageDownloadBridge(JNIEnv* env,
                             const base::android::JavaParamRef<jobject>& obj,
-                            content::BrowserContext* browser_context);
-  ~OfflinePageDownloadBridge();
+                            DownloadUIAdapter* download_ui_adapter);
+  ~OfflinePageDownloadBridge() override;
 
   static bool Register(JNIEnv* env);
 
   void Destroy(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);
 
   void GetAllItems(JNIEnv* env,
                    const base::android::JavaParamRef<jobject>& obj,
                    const base::android::JavaParamRef<jobject>& j_result_obj);
 
   base::android::ScopedJavaLocalRef<jobject> GetItemByGuid(
       JNIEnv* env,
       const base::android::JavaParamRef<jobject>& obj,
       const base::android::JavaParamRef<jstring>& j_guid);
 
-  void OnOfflinePageDownloadBridgeLoaded();
-  void OnOfflinePageDownloadItemAdded(const OfflinePageItem& item);
-  void OnOfflinePageDownloadItemDeleted(const std::string& guid);
-  void OnOfflinePageDownloadItemUpdated(const OfflinePageItem& item);
+  // DownloadUIAdapter::Observer implementation.
+  void ItemsLoaded() override;
+  void ItemAdded(const DownloadUIItem& item) override;
+  void ItemUpdated(const DownloadUIItem& item) override;
+  void ItemDeleted(const std::string& guid) override;
 
  private:
   JavaObjectWeakGlobalRef weak_java_ref_;
 
+  // Not owned.
+  DownloadUIAdapter* download_ui_adapter_;
+
   DISALLOW_COPY_AND_ASSIGN(OfflinePageDownloadBridge);
 };
 
 }  // namespace android
 }  // namespace offline_pages
 
 #endif  // CHROME_BROWSER_ANDROID_OFFLINE_PAGES_DOWNLOADS_OFFLINE_PAGE_DOWNLOAD_BRIDGE_H_