Make order of functions in .cc file matches those in .h file for add_to_homescreen_data_fetcher.*

chrome/browser/android/webapps/add_to_homescreen_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_WEBAPPS_ADD_TO_HOMESCREEN_DATA_FETCHER_H_
 #define CHROME_BROWSER_ANDROID_WEBAPPS_ADD_TO_HOMESCREEN_DATA_FETCHER_H_
 
 #include "base/callback_forward.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
@@ skipping 71 matching lines @@
 
   // IPC message received when the initialization is finished.
   void OnDidGetWebApplicationInfo(const WebApplicationInfo& web_app_info);
 
   // Accessors, etc.
   void set_weak_observer(Observer* observer) { weak_observer_ = observer; }
   bool is_ready() const { return is_ready_; }
   ShortcutInfo& shortcut_info() { return shortcut_info_; }
   const SkBitmap& shortcut_icon() const { return shortcut_icon_; }
 
-  // WebContentsObserver
-  bool OnMessageReceived(const IPC::Message& message) override;
-
  private:
   friend class base::RefCounted<AddToHomescreenDataFetcher>;
 
   ~AddToHomescreenDataFetcher() override;
 
+  // WebContentsObserver
+  bool OnMessageReceived(const IPC::Message& message) override;
+
+  // Called when InstallableManager finishes looking for a manifest and icon.
+  void OnDidPerformInstallableCheck(const InstallableData& data);
+
   // 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. shortcut_info_.url is
   // used to generate an icon if there is no bitmap in |bitmap_result| or the
   // bitmap is not large enough.
   void CreateLauncherIconFromFaviconInBackground(
       const favicon_base::FaviconRawBitmapResult& bitmap_result);
 
-  // Called when InstallableManager finishes looking for a manifest and icon.
-  void OnDidPerformInstallableCheck(const InstallableData& data);
-
   // Creates the launcher icon from the given |icon|.
   void CreateLauncherIconInBackground(const SkBitmap& raw__icon);
 
   // Notifies the observer that the shortcut data is all available.
   void NotifyObserver(const SkBitmap& icon);
 
   Observer* weak_observer_;
 
   // The icon must only be set on the UI thread for thread safety.
   SkBitmap shortcut_icon_;
@@ skipping 12 matching lines @@
   bool check_installable_;
   bool is_waiting_for_installable_check_;
   bool is_waiting_for_web_application_info_;
   bool is_icon_saved_;
   bool is_ready_;
 
   DISALLOW_COPY_AND_ASSIGN(AddToHomescreenDataFetcher);
 };
 
 #endif  // CHROME_BROWSER_ANDROID_WEBAPPS_ADD_TO_HOMESCREEN_DATA_FETCHER_H_