Create chrome/browser/offline_pages to host browser-related parts of offline_pages whcih

chrome/browser/android/offline_pages/background_loader_offliner.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_BACKGROUND_LOADER_OFFLINER_H_
-#define CHROME_BROWSER_ANDROID_OFFLINE_PAGES_BACKGROUND_LOADER_OFFLINER_H_
-
-#include <memory>
-
-#include "base/android/application_status_listener.h"
-#include "base/memory/weak_ptr.h"
-#include "base/values.h"
-#include "components/offline_pages/content/background_loader/background_loader_contents.h"
-#include "components/offline_pages/core/background/offliner.h"
-#include "components/offline_pages/core/offline_page_types.h"
-#include "components/offline_pages/core/snapshot_controller.h"
-#include "content/public/browser/web_contents_observer.h"
-
-namespace content {
-class BrowserContext;
-}  // namespace content
-
-namespace offline_pages {
-
-class OfflinerPolicy;
-class OfflinePageModel;
-
-// An Offliner implementation that attempts client-side rendering and saving
-// of an offline page. It uses the BackgroundLoader to load the page and the
-// OfflinePageModel to save it. Only one request may be active at a time.
-class BackgroundLoaderOffliner : public Offliner,
-                                 public content::WebContentsObserver,
-                                 public SnapshotController::Client {
- public:
-  BackgroundLoaderOffliner(content::BrowserContext* browser_context,
-                           const OfflinerPolicy* policy,
-                           OfflinePageModel* offline_page_model);
-  ~BackgroundLoaderOffliner() override;
-
-  static BackgroundLoaderOffliner* FromWebContents(
-      content::WebContents* contents);
-
-  // Offliner implementation.
-  bool LoadAndSave(const SavePageRequest& request,
-                   const CompletionCallback& completion_callback,
-                   const ProgressCallback& progress_callback) override;
-  bool Cancel(const CancelCallback& callback) override;
-  bool HandleTimeout(int64_t request_id) override;
-
-  // WebContentsObserver implementation.
-  void DocumentAvailableInMainFrame() override;
-  void DocumentOnLoadCompletedInMainFrame() override;
-  void RenderProcessGone(base::TerminationStatus status) override;
-  void WebContentsDestroyed() override;
-  void DidFinishNavigation(
-      content::NavigationHandle* navigation_handle) override;
-
-  // SnapshotController::Client implementation.
-  void StartSnapshot() override;
-
-  void SetSnapshotControllerForTest(
-      std::unique_ptr<SnapshotController> controller);
-  void OnNetworkBytesChanged(int64_t bytes);
-
- protected:
-  // Called to reset the loader.
-  virtual void ResetLoader();
-
- private:
-  friend class TestBackgroundLoaderOffliner;
-
-  enum SaveState { NONE, SAVING, DELETE_AFTER_SAVE };
-  enum PageLoadState { SUCCESS, RETRIABLE, NONRETRIABLE, DELAY_RETRY };
-
-  // Called when the page has been saved.
-  void OnPageSaved(SavePageResult save_result, int64_t offline_id);
-
-  // Called to reset internal loader and observer state.
-  void ResetState();
-
-  // Called to attach 'this' as the observer to the loader.
-  void AttachObservers();
-
-  // Called when application state has changed.
-  void OnApplicationStateChange(
-      base::android::ApplicationState application_state);
-
-  // Called to remember at what time we started loading.
-  void MarkLoadStartTime();
-
-  // Called to add a loading signal as we observe it.
-  void AddLoadingSignal(const char* signal_name);
-
-  void DeleteOfflinePageCallback(const SavePageRequest& request,
-                                 DeletePageResult result);
-
-  std::unique_ptr<background_loader::BackgroundLoaderContents> loader_;
-  // Not owned.
-  content::BrowserContext* browser_context_;
-  // Not owned.
-  OfflinePageModel* offline_page_model_;
-  // Not owned.
-  const OfflinerPolicy* policy_;
-  // Tracks pending request, if any.
-  std::unique_ptr<SavePageRequest> pending_request_;
-  // Handles determining when a page should be snapshotted.
-  std::unique_ptr<SnapshotController> snapshot_controller_;
-  // Callback when pending request completes.
-  CompletionCallback completion_callback_;
-  // Callback to report progress.
-  ProgressCallback progress_callback_;
-  // ApplicationStatusListener to monitor if Chrome moves to the foreground.
-  std::unique_ptr<base::android::ApplicationStatusListener> app_listener_;
-  // Whether we are on a low-end device.
-  bool is_low_end_device_;
-
-  // Save state.
-  SaveState save_state_;
-  // Page load state.
-  PageLoadState page_load_state_;
-  // Network bytes loaded.
-  int64_t network_bytes_;
-  // Whether the low bar of snapshot quality has been met.
-  bool is_low_bar_met_;
-  // Whether the snapshot is on the last retry.
-  bool did_snapshot_on_last_retry_;
-
-  // Time in ticks of when we start loading the page.
-  base::TimeTicks load_start_time_;
-
-  // Saves loading signals.
-  // TODO(petewil): We will be replacing this with the new snapshot controller.
-  base::DictionaryValue signal_data_;
-
-  // Callback for cancel.
-  CancelCallback cancel_callback_;
-
-  base::WeakPtrFactory<BackgroundLoaderOffliner> weak_ptr_factory_;
-  DISALLOW_COPY_AND_ASSIGN(BackgroundLoaderOffliner);
-};
-
-}  // namespace offline_pages
-#endif  // CHROME_BROWSER_ANDROID_OFFLINE_PAGES_BACKGROUND_LOADER_OFFLINER_H_