Add {Lock,Unlock,Show,Hide}Cursor() to the window manager mojom.

services/ui/ws/window_manager_state.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 "services/ui/ws/window_manager_state.h"
 
 #include <utility>
 
 #include "base/logging.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 113 matching lines @@
     const ui::KeyEvent& event) const {
   return key_code == event.key_code() &&
          event_flags == (kAcceleratorEventFlags & event.flags()) &&
          !event.is_char();
 }
 
 WindowManagerState::QueuedEvent::QueuedEvent() {}
 WindowManagerState::QueuedEvent::~QueuedEvent() {}
 
 WindowManagerState::WindowManagerState(WindowTree* window_tree)
-    : window_tree_(window_tree), event_dispatcher_(this) {
+    : window_tree_(window_tree),
+      event_dispatcher_(this),
+      cursor_state_(window_tree_->display_manager()) {
   frame_decoration_values_ = mojom::FrameDecorationValues::New();
   frame_decoration_values_->max_title_bar_button_width = 0u;
 
   AddDebugAccelerators();
 }
 
 WindowManagerState::~WindowManagerState() {
   for (auto& display_root : window_manager_display_roots_)
     display_root->display()->OnWillDestroyTree(window_tree_);
 
@@ skipping 449 matching lines @@
   // TODO(sky): maybe abstract this away so that DCHECK can be added?
   if (!platform_display_with_capture_)
     return;
 
   platform_display_with_capture_->ReleaseCapture();
   platform_display_with_capture_ = nullptr;
 }
 
 void WindowManagerState::UpdateNativeCursorFromDispatcher() {
   const ui::CursorData cursor = event_dispatcher_.GetCurrentMouseCursor();
-  for (Display* display : display_manager()->displays())
-    display->UpdateNativeCursor(cursor);
+  cursor_state_.SetCurrentWindowCursor(cursor);
 }
 
 void WindowManagerState::OnCaptureChanged(ServerWindow* new_capture,
                                           ServerWindow* old_capture) {
   window_server()->ProcessCaptureChanged(new_capture, old_capture);
 }
 
 void WindowManagerState::OnMouseCursorLocationChanged(const gfx::Point& point) {
   window_server()
       ->display_manager()
@@ skipping 96 matching lines @@
       window->RemoveObserver(this);
       orphaned_window_manager_display_roots_.erase(iter);
       return;
     }
   }
   NOTREACHED();
 }
 
 }  // namespace ws
 }  // namespace ui