Remove typo in app_update.cc.

Looks like there is a typo in the merge code for
additional_search_terms, it is still checking for permissions. Non of
the DCHECK condition sounds relevant for additional_search_terms, so
removed the DCHECK.

Bug: None
Change-Id: I2d58a018f622b74583d7e11b3bb70e2b83084619
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1797526Reviewed-by: Nigel Tao <nigeltao@chromium.org>
Commit-Queue: Maggie Cai <mxcai@chromium.org>
Cr-Commit-Position: refs/heads/master@{#695852}

chrome/services/app_service/public/cpp/app_update.cc

@@ -59,8 +59,6 @@ void AppUpdate::Merge(apps::mojom::App* state, const apps::mojom::App* delta) {
     state->version = delta->version;
   }
   if (!delta->additional_search_terms.empty()) {
-    DCHECK(state->permissions.empty() ||
-           (delta->permissions.size() == state->permissions.size()));
     state->additional_search_terms.clear();
     CloneStrings(delta->additional_search_terms,
                  &state->additional_search_terms);