Move thumbnail to history component

components/history/core/common/thumbnail_score.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 "chrome/common/thumbnail_score.h"
+#include "components/history/core/common/thumbnail_score.h"
 
 #include "base/logging.h"
 #include "base/strings/stringprintf.h"
 
 using base::Time;
 using base::TimeDelta;
 
 const int64 ThumbnailScore::kUpdateThumbnailTimeDays = 1;
 const double ThumbnailScore::kThumbnailMaximumBoringness = 0.94;
 const double ThumbnailScore::kThumbnailDegradePerHour = 0.01;
@@ skipping 115 matching lines @@
 bool ThumbnailScore::ShouldConsiderUpdating() {
   const TimeDelta time_elapsed = Time::Now() - time_at_snapshot;
   if (time_elapsed < TimeDelta::FromDays(kUpdateThumbnailTimeDays) &&
       good_clipping && at_top && load_completed) {
     // The current thumbnail is new and has good properties.
     return false;
   }
   // The current thumbnail should be updated.
   return true;
 }