Calls ShortcutHelper::FinalizeLauncherIcon() on worker thread instead of on IO thread

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 c41bba646d2bc503cf17410f3c9e7e43f45803e7..f24995dffcb498b862b1253665a6b640d85dce9a 100644
--- a/chrome/browser/android/shortcut_helper.h
+++ b/chrome/browser/android/shortcut_helper.h
@@ -102,9 +102,10 @@ class ShortcutHelper {
   // Returns the given icon, modified to match the launcher requirements.
   // This method may generate an entirely new icon; if this is the case,
   // |is_generated| will be set to |true|.
-  static SkBitmap FinalizeLauncherIcon(const SkBitmap& icon,
-                                       const GURL& url,
-                                       bool* is_generated);
+  // Must be called on a background worker thread.
+  static SkBitmap FinalizeLauncherIconInBackground(const SkBitmap& icon,
+                                                   const GURL& url,
+                                                   bool* is_generated);
 
   // Returns true if WebAPKs are enabled and there is a WebAPK installed which
   // can handle |url|.