Add a new entry to omnibox_event.proto to log specific type of contextual suggestions

components/omnibox/browser/omnibox_edit_model.cc

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/omnibox/browser/omnibox_edit_model.h"
 
 #include <algorithm>
 #include <string>
 #include <utility>
 
@@ skipping 671 matching lines @@
         ui::PageTransitionFromInt(
             match.transition | ui::PAGE_TRANSITION_FROM_ADDRESS_BAR),
         match.type);
     if (observer && observer->HasSeenPendingLoad())
       ignore_result(observer.release());  // The observer will delete itself.
   }
 
   BookmarkModel* bookmark_model = client_->GetBookmarkModel();
   if (bookmark_model && bookmark_model->IsBookmarked(match.destination_url))
     client_->OnBookmarkLaunched();
+  OmniboxFieldTrial::ContextualZeroSuggest::RecordTypeAsUsed(
+      match.specific_type);
 }
 
 bool OmniboxEditModel::AcceptKeyword(
       KeywordModeEntryMethod entry_method) {
   DCHECK(is_keyword_hint_ && !keyword_.empty());
 
   autocomplete_controller()->Stop(false);
 
   is_keyword_hint_ = false;
   keyword_mode_entry_method_ = entry_method;
@@ skipping 685 matching lines @@
   // Update state and notify view if the omnibox has focus and the caret
   // visibility changed.
   const bool was_caret_visible = is_caret_visible();
   focus_state_ = state;
   if (focus_state_ != OMNIBOX_FOCUS_NONE &&
       is_caret_visible() != was_caret_visible)
     view_->ApplyCaretVisibility();
 
   client_->OnFocusChanged(focus_state_, reason);
 }