[WIP] Make content_shell run under Wayland

ui/views/widget/desktop_aura/desktop_drag_drop_client_wayland.h

+// 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 UI_VIEWS_WIDGETS_DESKTOP_AURA_DESKTOP_DRAG_DROP_CLIENT_WAYLAND_H_
+#define UI_VIEWS_WIDGETS_DESKTOP_AURA_DESKTOP_DRAG_DROP_CLIENT_WAYLAND_H_
+
+#include "base/compiler_specific.h"
+#include "ui/views/views_export.h"
+#include "ui/wm/public/drag_drop_client.h"
+
+namespace views {
+
+class VIEWS_EXPORT DesktopDragDropClientWayland

[tonikitoo, 2016/06/06 15:29:59]

I believe we should start with the basis at this time, and leave DesktopDragDrop
support for a follow up patch.

By "basis" here I mean:

- DesktopScreenWayland
- DesktopWindowTreeHostWayland

[joone, 2016/06/06 18:22:22]

Ok, I will add DesktopDragDropClientWayland later.

+    : public aura::client::DragDropClient {
+ public:
+  explicit DesktopDragDropClientWayland(aura::Window* root_window);
+  ~DesktopDragDropClientWayland() override;
+
+  // Overridden from aura::client::DragDropClient:
+  int StartDragAndDrop(const ui::OSExchangeData& data,
+                       aura::Window* root_window,
+                       aura::Window* source_window,
+                       const gfx::Point& root_location,
+                       int operation,
+                       ui::DragDropTypes::DragEventSource source) override;
+  void DragUpdate(aura::Window* target,
+                  const ui::LocatedEvent& event) override;
+  void Drop(aura::Window* target,
+            const ui::LocatedEvent& event) override;
+  void DragCancel() override;
+  bool IsDragDropInProgress() override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(DesktopDragDropClientWayland);
+};
+
+}  // namespace views
+
+#endif  // UI_VIEWS_WIDGETS_DESKTOP_AURA_DESKTOP_DRAG_DROP_CLIENT_WAYLAND_H_