mus: Remove the old client lib.

services/ui/public/cpp/window_drop_target.h

Index: services/ui/public/cpp/window_drop_target.h
diff --git a/services/ui/public/cpp/window_drop_target.h b/services/ui/public/cpp/window_drop_target.h
deleted file mode 100644
index 0ff0c6cdf87f3e0f93c48b97795039a8068e2634..0000000000000000000000000000000000000000
--- a/services/ui/public/cpp/window_drop_target.h
+++ /dev/null
@@ -1,65 +0,0 @@
-// 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.
-
-#ifndef SERVICES_UI_PUBLIC_CPP_WINDOW_DROP_TARGET_H_
-#define SERVICES_UI_PUBLIC_CPP_WINDOW_DROP_TARGET_H_
-
-#include <map>
-#include <vector>
-
-#include "ui/gfx/geometry/point.h"
-
-namespace ui {
-
-// Interface that clients that want to opt-in to receiving drag drop events
-// pass to their ui::Window. This is the client side equivalent to the
-// messages defined in ui::mojom::WindowTreeClient.
-class WindowDropTarget {
- public:
-  // On the first time the pointer enters the associated ui::Window, we get a
-  // start message with all the data that's part of the drag. (The source
-  // ui::Window receives this immediately through the client library instead
-  // of asynchronously.)
-  virtual void OnDragDropStart(
-      std::map<std::string, std::vector<uint8_t>> mime_data) = 0;
-
-  // Each time the pointer enters the associated ui::Window, we receive an
-  // enter event and return a bitmask of drop operations that can be performed
-  // at this location, in terms of the ui::mojom::kDropEffect{None,Move,
-  // Copy,Link} constants.
-  virtual uint32_t OnDragEnter(uint32_t event_flags,
-                               const gfx::Point& position,
-                               uint32_t effect_bitmask) = 0;
-
-  // Each time the pointer moves inside the associated ui::Window, we receive
-  // an over event and return a bitmask of drop oeprations.
-  virtual uint32_t OnDragOver(uint32_t event_flags,
-                              const gfx::Point& position,
-                              uint32_t effect_bitmask) = 0;
-
-  // Each time the pointer leaves the associated ui::Window, we receive a
-  // leave event.
-  virtual void OnDragLeave() = 0;
-
-  // If the user releases the pointer over the associated ui::Window, we
-  // receive this drop event to actually try to perform the drop. Unlike the
-  // other methods in this class which return a value, this return value is not
-  // a bitmask and is the operation which was actually completed. Returning 0
-  // indicates that the drag failed and shouldn't be reported as a success.
-  virtual uint32_t OnCompleteDrop(uint32_t event_flags,
-                                  const gfx::Point& position,
-                                  uint32_t effect_bitmask) = 0;
-
-  // When a drag that entered the associated window finishes one way or
-  // another, the target receives this message to clear the mime_data from the
-  // start message, along with any other client specific caches.
-  virtual void OnDragDropDone() = 0;
-
- protected:
-  virtual ~WindowDropTarget() {}
-};
-
-}  // namespace ui
-
-#endif  // SERVICES_UI_PUBLIC_CPP_WINDOW_DROP_TARGET_H_