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

chrome/browser/android/shortcut_helper.h

Index: chrome/browser/android/shortcut_helper.h
diff --git a/chrome/browser/android/shortcut_helper.h b/chrome/browser/android/shortcut_helper.h
index b4a7bf633a162d3c8d35a37bcd4a75c7e6cb79dc..12e47931b41aa571f7a0e4904815b429a373982d 100644
--- a/chrome/browser/android/shortcut_helper.h
+++ b/chrome/browser/android/shortcut_helper.h
@@ -27,11 +27,26 @@ class ShortcutHelper {
                                                   const std::string& webapp_id,
                                                   const SkBitmap& icon_bitmap);
 
+  // Returns the ideal size for an icon representing a web app.
+  static int GetIdealHomescreenIconSizeInDp();
+
+  // Returns the minimum size for an icon representing a web app.
+  static int GetMinimumHomescreenIconSizeInDp();
+
+  // Returns the ideal size for an image displayed on a web app's splash
+  // screen.
+  static int GetIdealSplashImageSizeInDp();
+
+  // Returns the minimum size for an image displayed on a web app's splash
+  // screen.
+  static int GetMinimumSplashImageSizeInDp();
+
   // Fetches the splash screen image and stores it inside the WebappDataStorage
   // of the webapp.
   static void FetchSplashScreenImage(content::WebContents* web_contents,
                                      const GURL& image_url,
                                      const int ideal_splash_image_size_in_dp,
+                                     const int minimum_splash_image_size_in_dp,
                                      const std::string& webapp_id);
 
   // Stores the data of the webapp which is not placed inside the shortcut.