[gnome-shell] inputMethod: Fix delete-surrounding-text signal

[Carlos Garnacho <carlosg src gnome org>]

commit 6170bea28336cfab4f1e895c4d9f816b71227bca
Author: Takao Fujiwara <tfujiwar redhat com>
Date:   Wed Aug 14 17:16:46 2019 +0900

    inputMethod: Fix delete-surrounding-text signal
    
    Forward the arguments at the 'delete-surrounding-text' signal
    from IBusInputContext to clutter_input_method_delete_surrounding()
    so that ibus-typing-booster use the deleting surrounding text function.
    
    Input method engines can delete the output text in applications
    with this function.
    
    This change will require a change of mutter of mutter!517
    because the first arguemnt of the 'delete-surrounding-text' is INT
    to express the offset of the current cursor position but
    the first one of clutter_input_method_delete_surrounding() is UINT
    since the Wayland spec accepts UINT in delete_surrounding()
    
    mutter will change the type of the first one to INT in
    clutter_input_method_delete_surrounding() to work with this change.
    
    https://gitlab.gnome.org/GNOME/mutter/issues/539
    https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/477

 js/misc/inputMethod.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/js/misc/inputMethod.js b/js/misc/inputMethod.js
index ec3959dd91..386c07a75a 100644
--- a/js/misc/inputMethod.js
+++ b/js/misc/inputMethod.js
@@ -97,8 +97,8 @@ class InputMethod extends Clutter.InputMethod {
         this.commit(text.get_text());
     }
 
-    _onDeleteSurroundingText() {
-        this.delete_surrounding();
+    _onDeleteSurroundingText(_context, offset, nchars) {
+        this.delete_surrounding(offset, nchars);
     }
 
     _onUpdatePreeditText(_context, text, pos, visible) {