[Thumbnails] Specify copy size in Pixels, not DIPs

chrome/browser/thumbnails/content_based_thumbnailing_algorithm.h

 // 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.
 
 #ifndef CHROME_BROWSER_THUMBNAILS_CONTENT_BASED_THUMBNAILING_ALGORITHM_H_
 #define CHROME_BROWSER_THUMBNAILS_CONTENT_BASED_THUMBNAILING_ALGORITHM_H_
 
 #include "chrome/browser/thumbnails/thumbnailing_algorithm.h"
 
 namespace thumbnails {
 
 // Encapsulates a method of creating a thumbnail from a captured tab shot which
 // attempts to preserve only relevant fragments of the original image.
 // The algorithm detects areas of high activity at low resolution and discards
 // rows and columns which do not intersect with these areas.
 class ContentBasedThumbnailingAlgorithm : public ThumbnailingAlgorithm {
  public:
   explicit ContentBasedThumbnailingAlgorithm(const gfx::Size& target_size);
 
   ClipResult GetCanvasCopyInfo(const gfx::Size& source_size,
                                ui::ScaleFactor scale_factor,
                                gfx::Rect* clipping_rect,
-                               gfx::Size* target_size) const override;
+                               gfx::Size* copy_size) const override;
 
   void ProcessBitmap(scoped_refptr<ThumbnailingContext> context,
                      const ConsumerCallback& callback,
                      const SkBitmap& bitmap) override;
 
   // Prepares (clips to size, copies etc.) the bitmap passed to ProcessBitmap.
   // Always returns a bitmap that can be properly refcounted.
   // Extracted and exposed as a test seam.
   static SkBitmap PrepareSourceBitmap(const SkBitmap& received_bitmap,
                                       const gfx::Size& thumbnail_size,
@@ skipping 18 matching lines @@
                                    ClipResult* clip_result);
 
   const gfx::Size target_size_;
 
   DISALLOW_COPY_AND_ASSIGN(ContentBasedThumbnailingAlgorithm);
 };
 
 }  // namespace thumbnails
 
 #endif  // CHROME_BROWSER_THUMBNAILS_CONTENT_BASED_THUMBNAILING_ALGORITHM_H_