Tab dragging as implemented as a mus API.

services/ui/public/interfaces/window_manager_constants.mojom

 // Copyright 2015 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.
 
 module ui.mojom;
 
 import "ui/gfx/geometry/mojo/geometry.mojom";
 
 enum WindowManagerErrorCode {
   SUCCESS,
@@ skipping 44 matching lines @@
   int64 id;
   gfx.mojom.Rect bounds;
   gfx.mojom.Rect work_area;
   float device_pixel_ratio;
   Rotation rotation;
   TouchSupport touch_support;
   bool is_primary;
   FrameDecorationValues frame_decoration_values;
 };
 
+// Whether a client initiated move loop was started with a mouse event or a
+// touch event.
+enum MoveLoopSource {
+  MOUSE,
+  TOUCH
+};
+
 enum WindowType {
   // These constants come from Widget::InitParams. See it for details.
   // TODO: see if we can reduce this set. For example, why do we need both
   // BUBBLE and POPUP.
   WINDOW,
   PANEL,
   WINDOW_FRAMELESS,
   CONTROL,
   POPUP,
   MENU,
   TOOLTIP,
   BUBBLE,
   DRAG,
 };