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

chrome/browser/android/webapps/add_to_homescreen_data_fetcher.h

Index: chrome/browser/android/webapps/add_to_homescreen_data_fetcher.h
diff --git a/chrome/browser/android/webapps/add_to_homescreen_data_fetcher.h b/chrome/browser/android/webapps/add_to_homescreen_data_fetcher.h
index 3b40f042a17006ae1d795cd777caebee452772fa..11bc58b54438b118ba050eab2e977c5933b29cb6 100644
--- a/chrome/browser/android/webapps/add_to_homescreen_data_fetcher.h
+++ b/chrome/browser/android/webapps/add_to_homescreen_data_fetcher.h
@@ -54,7 +54,9 @@ class AddToHomescreenDataFetcher
   // OnDidGetWebApplicationInfo is expected to be called when finished.
   AddToHomescreenDataFetcher(content::WebContents* web_contents,
                              int ideal_splash_image_size_in_dp,
+                             int minimum_splash_image_size_in_dp,
                              int ideal_icon_size_in_dp,
+                             int minimum_icon_size_in_dp,
                              Observer* observer);
 
   // Called to fetch the splash screen image to be stored for the webapp with
@@ -109,7 +111,9 @@ class AddToHomescreenDataFetcher
   base::CancelableTaskTracker favicon_task_tracker_;
 
   const int ideal_splash_image_size_in_dp_;
+  const int minimum_splash_image_size_in_dp_;
   const int ideal_icon_size_in_dp_;
+  const int minimum_icon_size_in_dp_;
 
   friend class base::RefCounted<AddToHomescreenDataFetcher>;
   DISALLOW_COPY_AND_ASSIGN(AddToHomescreenDataFetcher);