[Thumbnails] Specify copy size in Pixels, not DIPs

chrome/browser/thumbnails/content_based_thumbnailing_algorithm.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/thumbnails/content_based_thumbnailing_algorithm.h"
 
 #include "base/metrics/histogram.h"
 #include "base/threading/sequenced_worker_pool.h"
 #include "chrome/browser/thumbnails/content_analysis.h"
 #include "chrome/browser/thumbnails/simple_thumbnail_crop.h"
@@ skipping 27 matching lines @@
 ContentBasedThumbnailingAlgorithm::ContentBasedThumbnailingAlgorithm(
     const gfx::Size& target_size)
     : target_size_(target_size) {
   DCHECK(!target_size.IsEmpty());
 }
 
 ClipResult ContentBasedThumbnailingAlgorithm::GetCanvasCopyInfo(
     const gfx::Size& source_size,
     ui::ScaleFactor scale_factor,
     gfx::Rect* clipping_rect,
-    gfx::Size* target_size) const {
+    gfx::Size* copy_size) const {
   DCHECK(!source_size.IsEmpty());
-  gfx::Size target_thumbnail_size =
+  gfx::Size copy_thumbnail_size =
       SimpleThumbnailCrop::GetCopySizeForThumbnail(scale_factor, target_size_);
 
   ClipResult clipping_method = thumbnails::CLIP_RESULT_NOT_CLIPPED;
-  *clipping_rect = GetClippingRect(
-      source_size, target_thumbnail_size, target_size, &clipping_method);
+  *clipping_rect = GetClippingRect(source_size, copy_thumbnail_size, copy_size,
+                                   &clipping_method);
   return clipping_method;
 }
 
 void ContentBasedThumbnailingAlgorithm::ProcessBitmap(
     scoped_refptr<ThumbnailingContext> context,
     const ConsumerCallback& callback,
     const SkBitmap& bitmap) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   DCHECK(context.get());
   if (bitmap.isNull() || bitmap.empty())
@@ skipping 167 matching lines @@
   } else {
     clipping_rect = gfx::Rect(source_size);
     target_size->SetSize(source_size.width() / 2, source_size.height() / 2);
     *clip_result = CLIP_RESULT_NOT_CLIPPED;
   }
 
   return clipping_rect;
 }
 
 }  // namespace thumbnails