exo: Fix cursor scale when crossing displays

components/exo/wm_helper_ash.cc

 // Copyright 2016 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 "components/exo/wm_helper_ash.h"
 
 #include "ash/accessibility_delegate.h"
 #include "ash/public/cpp/config.h"
 #include "ash/root_window_controller.h"
 #include "ash/shell.h"
@@ skipping 111 matching lines @@
 }
 
 bool WMHelperAsh::IsSpokenFeedbackEnabled() const {
   return ash::Shell::Get()->accessibility_delegate()->IsSpokenFeedbackEnabled();
 }
 
 void WMHelperAsh::PlayEarcon(int sound_key) const {
   return ash::Shell::Get()->accessibility_delegate()->PlayEarcon(sound_key);
 }
 
+void WMHelperAsh::SetCursor(gfx::NativeCursor cursor) {
+  ash::Shell* shell = ash::Shell::GetInstance();

[oshima, 2017/04/26 22:13:39]

nit ::Get()

+  static_cast<wm::NativeCursorManager*>(shell->native_cursor_manager())
+      ->SetCursor(cursor, shell->cursor_manager());

[oshima, 2017/04/26 22:13:39]

NativeCursorManager is to provide platform impls, so I'd like to avoid exposing
it to client. Just curious, do we need to lock the cursor?

[Dominik Laskowski, 2017/04/27 20:27:20]

Not really. It's mostly for consistency with Ash if the client happens to change
the cursor while dragging.

+}
+
 void WMHelperAsh::OnWindowActivated(
     aura::client::ActivationChangeObserver::ActivationReason reason,
     aura::Window* gained_active,
     aura::Window* lost_active) {
   NotifyWindowActivated(gained_active, lost_active);
 }
 
 void WMHelperAsh::OnWindowFocused(aura::Window* gained_focus,
                                   aura::Window* lost_focus) {
   NotifyWindowFocused(gained_focus, lost_focus);
@@ skipping 30 matching lines @@
 
 void WMHelperAsh::OnDisplayConfigurationChanged() {
   NotifyDisplayConfigurationChanged();
 }
 
 void WMHelperAsh::OnKeyboardDeviceConfigurationChanged() {
   NotifyKeyboardDeviceConfigurationChanged();
 }
 
 }  // namespace exo