Handle app custom icon via aura::Window property.

chrome/browser/ui/ash/launcher/chrome_launcher_controller.h

 // Copyright 2013 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_UI_ASH_LAUNCHER_CHROME_LAUNCHER_CONTROLLER_H_
 #define CHROME_BROWSER_UI_ASH_LAUNCHER_CHROME_LAUNCHER_CONTROLLER_H_
 
 #include <memory>
 #include <string>
 #include <vector>
@@ skipping 130 matching lines @@
   // otherwise launches and activates the app.
   // Used by the app-list, and by pinned-app shelf items.
   void ActivateApp(const std::string& app_id,
                    ash::ShelfLaunchSource source,
                    int event_flags);
 
   // Set the image for a specific shelf item (e.g. when set by the app).
   void SetLauncherItemImage(const ash::ShelfID& shelf_id,
                             const gfx::ImageSkia& image);
 
+  // Updates the image for a specific shelf item image from app image loader.

[msw, 2017/06/01 19:47:28]

nit: remove "image" after "shelf item", also "the app's icon loader":
"Updates the image for a specific shelf item from the app's icon loader."

[khmel, 2017/06/01 21:55:46]

Done.

+  void UpdateLauncherItemImage(const std::string& app_id);
+
   // Notify the controller that the state of an non platform app's tabs
   // have changed,
   void UpdateAppState(content::WebContents* contents, AppState app_state);
 
   // Returns ShelfID for |contents|. If |contents| is not an app or is not
   // pinned, returns the id of browser shrotcut.
   ash::ShelfID GetShelfIDForWebContents(content::WebContents* contents);
 
   // Limits application refocusing to urls that match |url| for |id|.
   void SetRefocusURLPatternForTest(const ash::ShelfID& id, const GURL& url);
@@ skipping 49 matching lines @@
   // animation predictions.
   bool ShelfBoundsChangesProbablyWithUser(ash::Shelf* shelf,
                                           const AccountId& account_id) const;
 
   // Called when the user profile is fully loaded and ready to switch to.
   void OnUserProfileReadyToSwitch(Profile* profile);
 
   // Controller to launch ARC apps in deferred mode.
   ArcAppDeferredLauncherController* GetArcDeferredLauncher();
 
-  AppIconLoader* GetAppIconLoaderForApp(const std::string& app_id);
-
   // Sets the shelf auto-hide and/or alignment behavior from prefs.
   void SetShelfAutoHideBehaviorFromPrefs();
   void SetShelfAlignmentFromPrefs();
   void SetShelfBehaviorsFromPrefs();
 
   // Temporarily prevent pinned shelf item changes from updating the sync model.
   using ScopedPinSyncDisabler = std::unique_ptr<base::AutoReset<bool>>;
   ScopedPinSyncDisabler GetScopedPinSyncDisabler();
 
   // Access to the BrowserStatusMonitor for tests.
@@ skipping 139 matching lines @@
 
   // app_list::AppListSyncableService::Observer:
   void OnSyncModelUpdated() override;
 
   // sync_preferences::PrefServiceSyncableObserver:
   void OnIsSyncingChanged() override;
 
   // An internal helper to unpin a shelf item; this does not update prefs.
   void UnpinShelfItemInternal(const ash::ShelfID& id);
 
+  // Resolves app icon image loader for the app.

[msw, 2017/06/01 19:47:28]

nit: "the app icon"

[khmel, 2017/06/01 21:55:46]

Done.

+  AppIconLoader* GetAppIconLoaderForApp(const std::string& app_id);
+
   static ChromeLauncherController* instance_;
 
   // The currently loaded profile used for prefs and loading extensions. This is
   // NOT necessarily the profile new windows are created with. Note that in
   // multi-profile use cases this might change over time.
   Profile* profile_ = nullptr;
 
   ash::ShelfModel* model_;
 
   // Ash's mojom::ShelfController used to change shelf state.
@@ skipping 47 matching lines @@
   using RunningAppListIds = std::vector<std::string>;
   using RunningAppListIdMap = std::map<std::string, RunningAppListIds>;
   RunningAppListIdMap last_used_running_application_order_;
 
   base::WeakPtrFactory<ChromeLauncherController> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeLauncherController);
 };
 
 #endif  // CHROME_BROWSER_UI_ASH_LAUNCHER_CHROME_LAUNCHER_CONTROLLER_H_