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..e5d5bcc31ffc1e0f73737cec1f0d55ae0a9d31d9 100644
--- a/chrome/browser/android/shortcut_helper.h
+++ b/chrome/browser/android/shortcut_helper.h
@@ -27,11 +27,28 @@ class ShortcutHelper {
                                                   const std::string& webapp_id,
                                                   const SkBitmap& icon_bitmap);
 
+  // Gets the ideal size that the image displayed on the splash screen
+  // should be.
+  static int GetIdealIconSizeInDp();
+
+  // Gets the minimum size that the image displayed on the splash screen
+  // should be.
+  static int GetMinimumIconSizeInDp();
+
+  // Gets the ideal size that the image displayed on the splash screen
+  // should be.
+  static int GetIdealSplashImageSizeInDp();
+
+  // Gets the minimum size that the image displayed on the splash screen
+  // should be.
+  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.