Add traces for main omnibox providers

components/omnibox/browser/history_quick_provider.cc

 // Copyright (c) 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/history_quick_provider.h"
 
 #include <stddef.h>
 
 #include <vector>
 
 #include "base/i18n/break_iterator.h"
 #include "base/logging.h"
 #include "base/metrics/field_trial.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
+#include "base/trace_event/trace_event.h"
 #include "components/bookmarks/browser/bookmark_model.h"
 #include "components/history/core/browser/history_database.h"
 #include "components/history/core/browser/history_service.h"
 #include "components/metrics/proto/omnibox_input_type.pb.h"
 #include "components/omnibox/browser/autocomplete_match_type.h"
 #include "components/omnibox/browser/autocomplete_provider_client.h"
 #include "components/omnibox/browser/autocomplete_result.h"
 #include "components/omnibox/browser/history_url_provider.h"
 #include "components/omnibox/browser/in_memory_url_index.h"
 #include "components/omnibox/browser/in_memory_url_index_types.h"
 #include "components/omnibox/browser/omnibox_field_trial.h"
 #include "components/omnibox/browser/url_prefix.h"
 #include "components/prefs/pref_service.h"
 #include "components/url_formatter/url_formatter.h"
 #include "net/base/escape.h"
 #include "net/base/registry_controlled_domains/registry_controlled_domain.h"
 #include "url/third_party/mozilla/url_parse.h"
 #include "url/url_util.h"
 
 bool HistoryQuickProvider::disabled_ = false;
 
 HistoryQuickProvider::HistoryQuickProvider(AutocompleteProviderClient* client)
     : HistoryProvider(AutocompleteProvider::TYPE_HISTORY_QUICK, client),
       languages_(client->GetAcceptLanguages()),
       in_memory_url_index_(client->GetInMemoryURLIndex()) {
 }
 
 void HistoryQuickProvider::Start(const AutocompleteInput& input,
                                  bool minimal_changes) {
+  TRACE_EVENT0("omnibox", "HistoryQuickProvider::Start");
   matches_.clear();
   if (disabled_ || input.from_omnibox_focus())
     return;
 
   // Don't bother with INVALID and FORCED_QUERY.
   if ((input.type() == metrics::OmniboxInputType::INVALID) ||
       (input.type() == metrics::OmniboxInputType::FORCED_QUERY))
     return;
 
   autocomplete_input_ = input;
@@ skipping 193 matching lines @@
   match.description = info.title();
   match.description_class = SpansFromTermMatch(
       history_match.title_matches, match.description.length(), false);
 
   match.RecordAdditionalInfo("typed count", info.typed_count());
   match.RecordAdditionalInfo("visit count", info.visit_count());
   match.RecordAdditionalInfo("last visit", info.last_visit());
 
   return match;
 }