Skip omnibox default match update check when input is from omnibox focus

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 647 matching lines @@
   std::unique_ptr<OmniboxNavigationObserver> observer(
       client_->CreateOmniboxNavigationObserver(
           input_text, match,
           autocomplete_controller()->history_url_provider()->SuggestExactInput(
               alternate_input, alternate_nav_url, false)));
 
   base::TimeDelta elapsed_time_since_last_change_to_default_match(
       now - autocomplete_controller()->last_time_default_match_changed());
   DCHECK(match.provider);
   // These elapsed times don't really make sense for ZeroSuggest matches
   // (because the user does not modify the omnibox for ZeroSuggest), so for

[Mark P, 2016/09/01 04:16:22]

Instead of first clause and parenthetical remark, perhaps:
// These elapsed times don't really make sense for matches that come from
omnibox focus (because the user did not modify the omnibox), so for ...

[mattreynolds, 2016/09/01 17:15:02]

Done.

   // those we set the elapsed times to something that will be ignored by
   // metrics_log.cc.  They also don't necessarily make sense if the omnibox
   // dropdown is closed or the user used a paste-and-go action.  (In most
   // cases when this happens, the user never modified the omnibox.)
   const bool popup_open = PopupIsOpen();
-  if ((match.provider->type() == AutocompleteProvider::TYPE_ZERO_SUGGEST) ||
-      !popup_open || !pasted_text.empty()) {
+  if (input_.from_omnibox_focus() || !popup_open || !pasted_text.empty()) {
     const base::TimeDelta default_time_delta =
         base::TimeDelta::FromMilliseconds(-1);
     elapsed_time_since_user_first_modified_omnibox = default_time_delta;
     elapsed_time_since_last_change_to_default_match = default_time_delta;
   }
   // If the popup is closed or this is a paste-and-go action (meaning the
   // contents of the dropdown are ignored regardless), we record for logging
   // purposes a selected_index of 0 and a suggestion list as having a single
   // entry of the match used.
   const bool dropdown_ignored = !popup_open || !pasted_text.empty();
@@ skipping 816 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);
 }