Record omnibox metrics on query tile selection

This CL calls RecordMetrics() on query tile selection, so that
Chrome will send the OmniboxEventProto to the backend.

BUG=1112961

Change-Id: Ia7d220c129c7f1624eb3462e467cbd0e98f4f60a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2336309
Commit-Queue: Min Qin <qinmin@chromium.org>
Reviewed-by: Ted Choc <tedchoc@chromium.org>
Reviewed-by: Tomasz Wiszkowski <ender@google.com>
Cr-Commit-Position: refs/heads/master@{#795691}

chrome/android/java/src/org/chromium/chrome/browser/omnibox/suggestions/AutocompleteMediator.java

@@ -1183,21 +1183,22 @@ class AutocompleteMediator implements OnSuggestionsReceivedListener, StartStopWi
     @SuppressWarnings("VisibleForTests")
     private void launchSearchUrlForQueryTileSuggestion(QueryTile queryTile) {
         int position = -1;
-        int hashCode = 0;
         int suggestionCount = getSuggestionCount();
+        OmniboxSuggestion suggestion = null;
         // Find the suggestion position and hashCode.
         for (int i = 0; i < suggestionCount; ++i) {
-            OmniboxSuggestion suggestion = getSuggestionAt(i);
+            suggestion = getSuggestionAt(i);
             if (suggestion.getType() == OmniboxSuggestionType.TILE_SUGGESTION) {
                 position = i;
-                hashCode = suggestion.hashCode();
                 break;
             }
         }
+        if (suggestion == null) return;
         GURL updatedUrl = mAutocomplete.updateMatchDestinationUrlWithQueryFormulationTime(position,
-                hashCode, getElapsedTimeSinceInputChange(), queryTile.queryText,
+                suggestion.hashCode(), getElapsedTimeSinceInputChange(), queryTile.queryText,
                 queryTile.searchParams);
         mDelegate.loadUrl(updatedUrl.getSpec(), PageTransition.LINK, mLastActionUpTimestamp);
         mDelegate.setKeyboardVisibility(false);
+        recordMetrics(position, WindowOpenDisposition.CURRENT_TAB, suggestion);
     }
 }