chromeos: Fix pixelated icons in app list and launcher (part 3)

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

Index: chrome/browser/ui/ash/launcher/chrome_launcher_controller.h
diff --git a/chrome/browser/ui/ash/launcher/chrome_launcher_controller.h b/chrome/browser/ui/ash/launcher/chrome_launcher_controller.h
index 6f8dddc070fd07008a0ca58dbcb9b73276338de7..e76129f815da53293632c1e9af5aa456dcda1bae 100644
--- a/chrome/browser/ui/ash/launcher/chrome_launcher_controller.h
+++ b/chrome/browser/ui/ash/launcher/chrome_launcher_controller.h
@@ -97,6 +97,9 @@ class ChromeLauncherController
     // Fetches the image for the specified id. When done (which may be
     // synchronous), this should invoke SetAppImage() on the LauncherUpdater.
     virtual void FetchImage(const std::string& id) = 0;
+
+    // Clears the image for specified id.
+    virtual void ClearImage(const std::string& id) = 0;
   };
 
   ChromeLauncherController(Profile* profile, ash::LauncherModel* model);