Skip updating autocomplete text only if the new and old one are identical.

Bug: 967818
Change-Id: I009a0edfd3b5f644fefe8e722556848b5c996b25
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1633029Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Commit-Queue: Jenny Zhang <jennyz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#664398}

ash/app_list/views/search_box_view.cc

@@ -512,7 +512,7 @@ void SearchBoxView::SetAutocompleteText(
   DCHECK(base::StartsWith(autocomplete_text, current_text,
                           base::CompareCase::INSENSITIVE_ASCII));
   // Don't set autocomplete text if it's the same as current search box text.
-  if (autocomplete_text.length() == current_text.length())
+  if (autocomplete_text == current_text)
     return;
 
   const base::string16& highlighted_text =