Linux Aura: Fixes and improvements for cursor loader

ui/views/widget/desktop_aura/desktop_cursor_loader_updater_auralinux.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 "ui/views/widget/desktop_aura/desktop_cursor_loader_updater_auralinux.h"
-
-#include <stddef.h>
-
-#include "base/macros.h"
-#include "base/memory/ptr_util.h"
-#include "ui/aura/window_event_dispatcher.h"
-#include "ui/base/cursor/cursor_loader.h"
-#include "ui/base/cursor/cursors_aura.h"
-#include "ui/display/display.h"
-
-namespace views {
-namespace {
-
-// Cursors that we need to supply our own image resources for. This was
-// generated from webcursor_gtk.cc; any cursor that either was NOTIMPLEMENTED()
-// or already was implemented with a pixmap is on this list.
-const int kImageCursorIds[] = {
-  ui::kCursorNorthEastSouthWestResize,
-  ui::kCursorNorthWestSouthEastResize,
-  ui::kCursorVerticalText,
-  ui::kCursorCell,
-  ui::kCursorContextMenu,
-  ui::kCursorAlias,
-  ui::kCursorNoDrop,
-  ui::kCursorCopy,
-  ui::kCursorNotAllowed,
-  ui::kCursorZoomIn,
-  ui::kCursorZoomOut,
-  ui::kCursorGrab,
-  ui::kCursorGrabbing,
-};
-
-void LoadImageCursors(float device_scale_factor, ui::CursorLoader* loader) {
-  int resource_id;
-  gfx::Point point;
-  for (size_t i = 0; i < arraysize(kImageCursorIds); ++i) {
-    bool success = ui::GetCursorDataFor(
-        ui::CURSOR_SET_NORMAL,  // Not support custom cursor set.
-        kImageCursorIds[i],
-        device_scale_factor,
-        &resource_id,
-        &point);
-    DCHECK(success);
-    loader->LoadImageCursor(kImageCursorIds[i], resource_id, point);
-  }
-}
-
-}  // namespace
-
-DesktopCursorLoaderUpdaterAuraLinux::DesktopCursorLoaderUpdaterAuraLinux() {}
-
-DesktopCursorLoaderUpdaterAuraLinux::~DesktopCursorLoaderUpdaterAuraLinux() {}
-
-void DesktopCursorLoaderUpdaterAuraLinux::OnCreate(
-    float device_scale_factor,
-    ui::CursorLoader* loader) {
-  LoadImageCursors(device_scale_factor, loader);
-}
-
-void DesktopCursorLoaderUpdaterAuraLinux::OnDisplayUpdated(
-    const display::Display& display,
-    ui::CursorLoader* loader) {
-  LoadImageCursors(display.device_scale_factor(), loader);
-}
-
-// static
-std::unique_ptr<DesktopCursorLoaderUpdater>
-DesktopCursorLoaderUpdater::Create() {
-  return base::WrapUnique(new DesktopCursorLoaderUpdaterAuraLinux);
-}
-
-}  // namespace views