Bug 1105795 - Avoid ClassCastException in testAboutHomeVisibility; r=mcomella

mobile/android/base/tests/components/ToolbarComponent.java

@@ -122,8 +122,8 @@ public class ToolbarComponent extends BaseComponent {
     /**
      * Returns the View for the edit cancel button in the browser toolbar.
      */
-    private ImageButton getEditCancelButton() {
-        return (ImageButton) getToolbarView().findViewById(R.id.edit_cancel);
+    private View getEditCancelButton() {
+        return getToolbarView().findViewById(R.id.edit_cancel);
     }
 
     private String getTitle() {