Record NTP.LogoShownTime for timely refreshs only

chrome/browser/android/logo_bridge.h

 // Copyright 2014 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.
 
 #ifndef CHROME_BROWSER_ANDROID_LOGO_BRIDGE_H_
 #define CHROME_BROWSER_ANDROID_LOGO_BRIDGE_H_
 
 #include <jni.h>
 
 #include <memory>
@@ skipping 44 matching lines @@
                        const base::android::JavaParamRef<jstring>& j_url);
 
  private:
   class AnimatedLogoFetcher;
 
   virtual ~LogoBridge();
 
   // doodle::DoodleService::Observer implementation.
   void OnDoodleConfigUpdated(
       const base::Optional<doodle::DoodleConfig>& maybe_doodle_config) override;
+  void OnDoodleConfigUnchanged() override;
 
   void DoodleConfigReceived(
       const base::Optional<doodle::DoodleConfig>& maybe_doodle_config,
       bool from_cache);
 
   void DoodleImageFetched(bool config_from_cache,
                           const GURL& on_click_url,
                           const std::string& alt_text,
                           const GURL& animated_image_url,
                           const std::string& image_fetch_id,
@@ skipping 13 matching lines @@
   std::unique_ptr<AnimatedLogoFetcher> animated_logo_fetcher_;
 
   base::WeakPtrFactory<LogoBridge> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(LogoBridge);
 };
 
 bool RegisterLogoBridge(JNIEnv* env);
 
 #endif  // CHROME_BROWSER_ANDROID_LOGO_BRIDGE_H_