Refactor ShortcutHelper and merge in BookmarkUtils

chrome/browser/android/shortcut_data_fetcher.h

-// Copyright 2015 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_SHORTCUT_DATA_FETCHER_H_
-#define CHROME_BROWSER_ANDROID_SHORTCUT_DATA_FETCHER_H_
-
-#include "base/basictypes.h"
-#include "base/task/cancelable_task_tracker.h"
-#include "base/timer/timer.h"
-#include "chrome/browser/android/shortcut_info.h"
-#include "chrome/common/web_application_info.h"
-#include "components/favicon_base/favicon_types.h"
-#include "content/public/browser/web_contents_observer.h"
-#include "content/public/common/manifest.h"
-
-namespace content {
-class WebContents;
-}  // namespace content
-
-namespace IPC {
-class Message;
-}
-
-class GURL;
-
-// Aysnchronously fetches and processes data needed to create a shortcut for an
-// Android Home screen launcher.
-//
-// Because of the various asynchronous calls made by this class, it is
-// refcounted to prevent the class from being prematurely deleted.  If the
-// pointer to the ShortcutHelper becomes invalid, the pipeline should kill
-// itself.
-class ShortcutDataFetcher
-    : public base::RefCounted<ShortcutDataFetcher>,
-      public content::WebContentsObserver {
- public:
-  class Observer {
-   public:
-    // Called when the title of the page is available.
-    virtual void OnUserTitleAvailable(const base::string16& title) = 0;
-
-    // Converts the icon into one that can be used on the Android Home screen.
-    virtual SkBitmap FinalizeLauncherIcon(const SkBitmap& icon,
-                                          const GURL& url) = 0;
-
-    // Called when all the data needed to create a shortcut is available.
-    virtual void OnDataAvailable(const ShortcutInfo& info,
-                                 const SkBitmap& icon) = 0;
-  };
-
-  // Initialize the fetcher by requesting the information about the page to the
-  // renderer process. The initialization is asynchronous and
-  // OnDidGetWebApplicationInfo is expected to be called when finished.
-  ShortcutDataFetcher(content::WebContents* web_contents, Observer* observer);
-
-  // IPC message received when the initialization is finished.
-  void OnDidGetWebApplicationInfo(const WebApplicationInfo& web_app_info);
-
-  // Called when the Manifest has been parsed, or if no Manifest was found.
-  void OnDidGetManifest(const content::Manifest& manifest);
-
-  // Accessors, etc.
-  void set_weak_observer(Observer* observer) { weak_observer_ = observer; }
-  bool is_ready() { return is_ready_; }
-  ShortcutInfo& shortcut_info() { return shortcut_info_; }
-  const SkBitmap& shortcut_icon() { return shortcut_icon_; }
-
-  // WebContentsObserver
-  bool OnMessageReceived(const IPC::Message& message) override;
-
- private:
-  ~ShortcutDataFetcher() override;
-
-  // Grabs the favicon for the current URL.
-  void FetchFavicon();
-  void OnFaviconFetched(
-      const favicon_base::FaviconRawBitmapResult& bitmap_result);
-
-  // Creates the launcher icon from the given bitmap.
-  void CreateLauncherIcon(
-      const favicon_base::FaviconRawBitmapResult& bitmap_result);
-
-  // Callback run after an attempt to download manifest icon has been made.  May
-  // kick off the download of a favicon if it failed.
-  void OnManifestIconFetched(int id,
-                             int http_status_code,
-                             const GURL& url,
-                             const std::vector<SkBitmap>& bitmaps,
-                             const std::vector<gfx::Size>& sizes);
-
-  // Notifies the observer that the shortcut data is all available.
-  void NotifyObserver(const SkBitmap& icon);
-
-  Observer* weak_observer_;
-
-  bool is_waiting_for_web_application_info_;
-  bool is_icon_saved_;
-  bool is_ready_;
-  base::Timer icon_timeout_timer_;
-  ShortcutInfo shortcut_info_;
-
-  // The icon must only be set on the UI thread for thread safety.
-  SkBitmap shortcut_icon_;
-  base::CancelableTaskTracker favicon_task_tracker_;
-
-  const int preferred_icon_size_in_px_;
-  static const int kPreferredIconSizeInDp;
-
-  friend class base::RefCounted<ShortcutDataFetcher>;
-  DISALLOW_COPY_AND_ASSIGN(ShortcutDataFetcher);
-};
-
-#endif  // CHROME_BROWSER_ANDROID_SHORTCUT_DATA_FETCHER_H_