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

chrome/browser/ui/omnibox/chrome_omnibox_client.cc

 // Copyright 2013 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 "chrome/browser/ui/omnibox/chrome_omnibox_client.h"
 
 #include <stddef.h>
 
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 238 matching lines @@
     return;
   SearchTabHelper::FromWebContents(
       controller_->GetWebContents())->OmniboxInputStateChanged();
 }
 
 void ChromeOmniboxClient::OnFocusChanged(
     OmniboxFocusState state,
     OmniboxFocusChangeReason reason) {
   if (!controller_->GetWebContents())
     return;
+
+  controller_->OnFocusChanged(state);
+
   SearchTabHelper::FromWebContents(
       controller_->GetWebContents())->OmniboxFocusChanged(state, reason);
 }
 
 void ChromeOmniboxClient::OnResultChanged(
     const AutocompleteResult& result,
     bool default_match_changed,
     const base::Callback<void(const SkBitmap& bitmap)>& on_bitmap_fetched) {
   if (search::IsInstantExtendedAPIEnabled() &&
       (default_match_changed && result.default_match() != result.end())) {
@@ skipping 182 matching lines @@
       InstantSearchPrerenderer::GetForProfile(profile_);
   if (prerenderer)
     prerenderer->Prerender(suggestion);
 }
 
 void ChromeOmniboxClient::OnBitmapFetched(const BitmapFetchedCallback& callback,
                                           const SkBitmap& bitmap) {
   request_id_ = BitmapFetcherService::REQUEST_ID_INVALID;
   callback.Run(bitmap);
 }