Fixed the issue shows keyword hint when omnibox loses its focus.

chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm

Index: chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm
diff --git a/chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm b/chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm
index 0baec69b671abc3f7f965f1a9a33220de800f46d..b5828d60750bc6ef129e215d6c749050b51f0aa4 100644
--- a/chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm
+++ b/chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm
@@ -495,7 +495,9 @@ void LocationBarViewMac::Layout() {
     selected_keyword_decoration_->SetImage(GetKeywordImage(keyword));
   } else if (!keyword.empty() && is_keyword_hint) {
     keyword_hint_decoration_->SetKeyword(short_name, is_extension_keyword);
-    keyword_hint_decoration_->SetVisible(true);
+    if (focus_state_ == OMNIBOX_FOCUS_VISIBLE) {
+      keyword_hint_decoration_->SetVisible(true);
+    }
   } else if (ShouldShowEVBubble()) {
     // Switch from location icon to show the EV bubble instead.
     location_icon_decoration_->SetVisible(false);
@@ -684,6 +686,12 @@ WebContents* LocationBarViewMac::GetWebContents() {
   return browser_->tab_strip_model()->GetActiveWebContents();
 }
 
+void LocationBarViewMac::OnFocusChanged(OmniboxFocusState state) {
+  focus_state_ = state;
+
+  Layout();
+}
+
 bool LocationBarViewMac::ShouldShowEVBubble() const {
   return (GetToolbarModel()->GetSecurityLevel(false) ==
           security_state::SecurityStateModel::EV_SECURE) &&