Wire up CursorManager for DesktopWindowTreeHostMus

ui/aura/mus/window_port_mus.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 "ui/aura/mus/window_port_mus.h"
 
 #include "ui/aura/client/aura_constants.h"
 #include "ui/aura/client/transient_window_client.h"
 #include "ui/aura/mus/property_converter.h"
 #include "ui/aura/mus/surface_id_handler.h"
@@ skipping 40 matching lines @@
 void WindowPortMus::SetTextInputState(mojo::TextInputStatePtr state) {
   window_tree_client_->SetWindowTextInputState(this, std::move(state));
 }
 
 void WindowPortMus::SetImeVisibility(bool visible,
                                      mojo::TextInputStatePtr state) {
   window_tree_client_->SetImeVisibility(this, visible, std::move(state));
 }
 
 void WindowPortMus::SetPredefinedCursor(ui::mojom::Cursor cursor_id) {
+  if (cursor_id == predefined_cursor_)
+    return;
+
   window_tree_client_->SetPredefinedCursor(this, predefined_cursor_, cursor_id);
   predefined_cursor_ = cursor_id;
 }
 
 std::unique_ptr<WindowCompositorFrameSink>
 WindowPortMus::RequestCompositorFrameSink(
     ui::mojom::CompositorFrameSinkType type,
     scoped_refptr<cc::ContextProvider> context_provider,
     gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager) {
   std::unique_ptr<WindowCompositorFrameSinkBinding>
@@ skipping 340 matching lines @@
   change_data.property_name =
       GetPropertyConverter()->GetTransportNameForPropertyKey(key);
   // TODO(sky): investigate to see if we need to compare data. In particular do
   // we ever have a case where changing a property cascades into changing the
   // same property?
   if (!RemoveChangeByTypeAndData(ServerChangeType::PROPERTY, change_data))
     window_tree_client_->OnWindowMusPropertyChanged(this, key, std::move(data));
 }
 
 }  // namespace aura