Add traces for main omnibox providers

components/omnibox/browser/history_quick_provider.cc

Index: components/omnibox/browser/history_quick_provider.cc
diff --git a/components/omnibox/browser/history_quick_provider.cc b/components/omnibox/browser/history_quick_provider.cc
index ef223266f096a759d2f6ea3473c73b4969e35cbb..bf7db5ce95da22ee63ba407bc605928b8117abde 100644
--- a/components/omnibox/browser/history_quick_provider.cc
+++ b/components/omnibox/browser/history_quick_provider.cc
@@ -14,6 +14,7 @@
 #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"
@@ -43,6 +44,7 @@ HistoryQuickProvider::HistoryQuickProvider(AutocompleteProviderClient* client)
 
 void HistoryQuickProvider::Start(const AutocompleteInput& input,
                                  bool minimal_changes) {
+  TRACE_EVENT0("omnibox", "HistoryQuickProvider::Start");
   matches_.clear();
   if (disabled_ || input.from_omnibox_focus())
     return;