Use SkBitmapOperations to extract a frame of animation cursors.

ui/base/cursor/cursor_loader_x11.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 "ui/base/cursor/cursor_loader_x11.h"
 
 #include <float.h>
 #include <X11/Xlib.h>
 #include <X11/cursorfont.h>
 
@@ skipping 214 matching lines @@
   int frame_count = total_width / frame_width;
   DCHECK_GT(frame_count, 0);
   XcursorImages* x_images = XcursorImagesCreate(frame_count);
   x_images->nimage = frame_count;
 
   for (int frame = 0; frame < frame_count; ++frame) {
     gfx::Point hotpoint = hot;
     int x_offset = frame_width * frame;
     DCHECK_LE(x_offset + frame_width, total_width);
 
-    SkBitmap cropped;
-    SkIRect rect = SkIRect::MakeXYWH(x_offset, 0, frame_width, frame_height);
-    bitmap.extractSubset(&cropped, rect);
+    SkBitmap cropped = SkBitmapOperations::CreateTiledBitmap(
+        bitmap, x_offset, 0, frame_width, frame_height);
     DCHECK_EQ(frame_width, cropped.width());
     DCHECK_EQ(frame_height, cropped.height());
 
-    if (scale() != 1.f)
-      ScaleCursorImageAndHotpoint(scale(), &cropped, &hotpoint);
+    XcursorImage* x_image = SkBitmapToXcursorImage(&cropped, hotpoint);
 
-    XcursorImage* x_image = SkBitmapToXcursorImage(&cropped, hotpoint);
     x_image->delay = frame_delay_ms;
     x_images->images[frame] = x_image;
   }
 
   animated_cursors_[id] = std::make_pair(
       XcursorImagesLoadCursor(GetXDisplay(), x_images), x_images);
   // |bitmap| is owned by the resource bundle. So we do not need to free it.
 }
 
 void CursorLoaderX11::UnloadAll() {
@@ skipping 40 matching lines @@
   if (animated_cursors_.count(type))
     return animated_cursors_[type].first;
 
   ImageCursorMap::iterator find = cursors_.find(type);
   if (find != cursors_.end())
     return cursors_[type];
   return GetXCursor(CursorShapeFromNative(native_cursor));
 }
 
 }  // namespace ui