[Mac] Preserve original selection when suggesting completions with diacritics

chrome/browser/ui/cocoa/location_bar/autocomplete_text_field_editor.h

Index: chrome/browser/ui/cocoa/location_bar/autocomplete_text_field_editor.h
diff --git a/chrome/browser/ui/cocoa/location_bar/autocomplete_text_field_editor.h b/chrome/browser/ui/cocoa/location_bar/autocomplete_text_field_editor.h
index dc284b4e0df63aae835b2ebac101746a4902a322..134e5eeb853d14c52a629956b46a01b02ee4383e 100644
--- a/chrome/browser/ui/cocoa/location_bar/autocomplete_text_field_editor.h
+++ b/chrome/browser/ui/cocoa/location_bar/autocomplete_text_field_editor.h
@@ -39,6 +39,14 @@ class AutocompleteTextFieldObserver;
 
   // Indicates if the text has been changed by key events.
   BOOL textChangedByKeyEvents_;
+
+  // Stores requested selection range, before it's adjusted to grapheme
+  // boundaries. This range is what text editing commands
+  // will operate on, vs. |visualSelectionRange_|, which reflects the
+  // range that looks highlighted. [self selectedRange] returns this.
+  NSRange actualSelectionRange_;
+  // The selected range as far as NSTextView is concerned.
+  NSRange visualSelectionRange_;
 }
 
 // The delegate is always an AutocompleteTextField*.  Override the superclass