Do not show "Add to Home Screen" info bar if WebAPK is installed

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 d2fabef8b72c53ec86ecc108cbb703b369fd727d..fd8d2d3926af657e331721f340319a90381bd1ef 100644
--- a/chrome/browser/android/shortcut_helper.h
+++ b/chrome/browser/android/shortcut_helper.h
@@ -72,6 +72,9 @@ class ShortcutHelper {
                                        const GURL& url,
                                        bool* is_generated);
 
+  // Returns whether there is a WebAPK installed which can handle |url|.
+  static bool IsWebApkInstalled(const GURL& url);
+
  private:
   ShortcutHelper() = delete;
   ~ShortcutHelper() = delete;