hidpi support for custom cursors in windows

content/common/cursors/webcursor_aurax11.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 "content/common/cursors/webcursor.h"
 
 #include <X11/cursorfont.h>
 #include <X11/Xcursor/Xcursor.h>
 #include <X11/Xlib.h>
 
 #include "base/logging.h"
 #include "third_party/WebKit/public/platform/WebCursorInfo.h"
 #include "ui/base/cursor/cursor.h"
 #include "ui/base/cursor/cursor_loader_x11.h"
-#include "ui/base/cursor/cursor_util.h"
 #include "ui/base/x/x11_util.h"
 
 namespace content {
 
 ui::PlatformCursor WebCursor::GetPlatformCursor() {
   if (platform_cursor_)
     return platform_cursor_;
 
-  if (custom_data_.size() == 0)
-    return 0;
-
   SkBitmap bitmap;
-  bitmap.allocN32Pixels(custom_size_.width(), custom_size_.height());
-  memcpy(bitmap.getAddr32(0, 0), custom_data_.data(), custom_data_.size());
-  gfx::Point hotspot = hotspot_;
-  ui::ScaleAndRotateCursorBitmapAndHotpoint(
-      device_scale_factor_, gfx::Display::ROTATE_0, &bitmap, &hotspot);
+  gfx::Point hotspot;
+  CreateScaledBitmapAndHotspotFromCustomData(&bitmap, &hotspot);
 
   XcursorImage* image = ui::SkBitmapToXcursorImage(&bitmap, hotspot);
   platform_cursor_ = ui::CreateReffedCustomXCursor(image);
   return platform_cursor_;
 }
 
-void WebCursor::SetDisplayInfo(const gfx::Display& display) {
-  if (device_scale_factor_ == display.device_scale_factor())
-    return;
-
-  device_scale_factor_ = display.device_scale_factor();
-  if (platform_cursor_)
-    ui::UnrefCustomXCursor(platform_cursor_);
-  platform_cursor_ = 0;
-  // It is not necessary to recreate platform_cursor_ yet, since it will be
-  // recreated on demand when GetPlatformCursor is called.
-}
-
 void WebCursor::InitPlatformData() {
   platform_cursor_ = 0;
   device_scale_factor_ = 1.f;
 }
 
 bool WebCursor::SerializePlatformData(base::Pickle* pickle) const {
   return true;
 }
 
 bool WebCursor::DeserializePlatformData(base::PickleIterator* iter) {
@@ skipping 15 matching lines @@
   if (platform_cursor_)
     ui::UnrefCustomXCursor(platform_cursor_);
   platform_cursor_ = other.platform_cursor_;
   if (platform_cursor_)
     ui::RefCustomXCursor(platform_cursor_);
 
   device_scale_factor_ = other.device_scale_factor_;
 }
 
 }  // namespace content