Make ui::TextInputClient::IsEditCommandEnabled const.

ui/views/controls/textfield/textfield.cc

Index: ui/views/controls/textfield/textfield.cc
diff --git a/ui/views/controls/textfield/textfield.cc b/ui/views/controls/textfield/textfield.cc
index ecce8fc2f1e6609e7358724d3dcd1fad38c27f69..be739e44479b1a853e7a3ec4f22db77e889bb8c5 100644
--- a/ui/views/controls/textfield/textfield.cc
+++ b/ui/views/controls/textfield/textfield.cc
@@ -1641,7 +1641,7 @@ void Textfield::ExtendSelectionAndDelete(size_t before, size_t after) {
 
 void Textfield::EnsureCaretInRect(const gfx::Rect& rect) {}
 
-bool Textfield::IsEditCommandEnabled(int command_id) {
+bool Textfield::IsEditCommandEnabled(int command_id) const {
   return IsCommandIdEnabled(command_id);
 }