Implement large cursors in Mushrome.

ash/wm/native_cursor_manager_ash_mus.cc

 // Copyright 2017 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 "ash/wm/native_cursor_manager_ash_mus.h"
 
 #include "ash/display/cursor_window_controller.h"
 #include "ash/display/window_tree_host_manager.h"
 #include "ash/shell.h"
 #include "ash/shell_port.h"
@@ skipping 156 matching lines @@
     SetCursor(delegate->GetCursor(), delegate);
   } else {
     gfx::NativeCursor invisible_cursor(ui::CursorType::kNone);
     image_cursors_->SetPlatformCursor(&invisible_cursor);
     SetCursorOnAllRootWindows(invisible_cursor);
   }
 
   NotifyCursorVisibilityChange(visible);
 }
 
-void NativeCursorManagerAshMus::SetCursorSet(
-    ui::CursorSetType cursor_set,
+void NativeCursorManagerAshMus::SetCursorSize(
+    ui::CursorSize cursor_size,
     ::wm::NativeCursorManagerDelegate* delegate) {
-  // We can't just hand this off to ImageCursors like we do in the classic ash
-  // case. We need to collaborate with the mus server to fully implement this.
-  NOTIMPLEMENTED();
+  delegate->CommitCursorSize(cursor_size);
+
+  ShellPort::Get()->SetCursorSize(cursor_size);
+
+  Shell::Get()
+      ->window_tree_host_manager()
+      ->cursor_window_controller()
+      ->SetCursorSize(cursor_size);
 }
 
 void NativeCursorManagerAshMus::SetMouseEventsEnabled(
     bool enabled,
     ::wm::NativeCursorManagerDelegate* delegate) {
   delegate->CommitMouseEventsEnabled(enabled);
 
   if (enabled) {
     aura::Env::GetInstance()->set_last_mouse_location(
         disabled_cursor_location_);
   } else {
     disabled_cursor_location_ = aura::Env::GetInstance()->last_mouse_location();
   }
 
   SetVisibility(delegate->IsCursorVisible(), delegate);
 
   NotifyMouseEventsEnableStateChange(enabled);
 }
 
 }  // namespace ash