webapps: allow callers of icon downloader/selector to specify a minimum size

chrome/browser/banners/app_banner_manager_desktop.h

Index: chrome/browser/banners/app_banner_manager_desktop.h
diff --git a/chrome/browser/banners/app_banner_manager_desktop.h b/chrome/browser/banners/app_banner_manager_desktop.h
index 26347edc8da389f62a18ff3953ea3dc06f7221a0..3db9508ac19ba5cf4011e9914c140c8762a77eef 100644
--- a/chrome/browser/banners/app_banner_manager_desktop.h
+++ b/chrome/browser/banners/app_banner_manager_desktop.h
@@ -20,8 +20,7 @@ class AppBannerManagerDesktop
 
  protected:
   AppBannerDataFetcher* CreateAppBannerDataFetcher(
-      base::WeakPtr<AppBannerDataFetcher::Delegate> weak_delegate,
-      const int ideal_icon_size) override;
+      base::WeakPtr<AppBannerDataFetcher::Delegate> weak_delegate) override;
 
  private:
   explicit AppBannerManagerDesktop(content::WebContents* web_contents);