Move thumbnail to history component

components/history/core/common/thumbnail_score.h

 // 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.
 
-#ifndef CHROME_COMMON_THUMBNAIL_SCORE_H_
-#define CHROME_COMMON_THUMBNAIL_SCORE_H_
+#ifndef COMPONENTS_HISTORY_CORE_COMMON_THUMBNAIL_SCORE_H_
+#define COMPONENTS_HISTORY_CORE_COMMON_THUMBNAIL_SCORE_H_
 
 #include <string>
 #include "base/time/time.h"
 
 // A set of metadata about a Thumbnail.
 struct ThumbnailScore {
   // Initializes the ThumbnailScore to the absolute worst possible values
   // except for time, which is set to Now(), and redirect_hops_from_dest which
   // is set to 0.
   ThumbnailScore();
 
   // Builds a ThumbnailScore with the passed in values, and sets the
   // thumbnail generation time to Now().
   ThumbnailScore(double score, bool clipping, bool top);
 
   // Builds a ThumbnailScore with the passed in values.
-  ThumbnailScore(double score, bool clipping, bool top,
-                 const base::Time& time);
+  ThumbnailScore(double score, bool clipping, bool top, const base::Time& time);
   ~ThumbnailScore();
 
   // Tests for equivalence between two ThumbnailScore objects.
   bool Equals(const ThumbnailScore& rhs) const;
 
   // Returns string representation of this object.
   std::string ToString() const;
 
   // How "boring" a thumbnail is. The boring score is the 0,1 ranged
   // percentage of pixels that are the most common luma. Higher boring
@@ skipping 67 matching lines @@
   // Checks whether we should consider updating a new thumbnail based on
   // this score. For instance, we don't have to update a new thumbnail
   // if the current thumbnail is new and interesting enough.
   bool ShouldConsiderUpdating();
 };
 
 // Checks whether we should replace one thumbnail with another.
 bool ShouldReplaceThumbnailWith(const ThumbnailScore& current,
                                 const ThumbnailScore& replacement);
 
-#endif  // CHROME_COMMON_THUMBNAIL_SCORE_H_
+#endif  // COMPONENTS_HISTORY_CORE_COMMON_THUMBNAIL_SCORE_H_