aura: Add X11 host window management.

ui/aura/hostwm/host_window_manager_client.h

Index: ui/aura/hostwm/host_window_manager_client.h
diff --git a/ui/aura/hostwm/host_window_manager_client.h b/ui/aura/hostwm/host_window_manager_client.h
new file mode 100644
index 0000000000000000000000000000000000000000..f7d9613104312603b62c018e5a980f1a42639c2a
--- /dev/null
+++ b/ui/aura/hostwm/host_window_manager_client.h
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 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_AURA_HOSTWM_HOST_WINDOW_MANAGER_CLIENT_H_
+#define UI_AURA_HOSTWM_HOST_WINDOW_MANAGER_CLIENT_H_
+
+#include "ui/aura/aura_export.h"
+#include "ui/gfx/rect.h"
+#include "ui/gfx/native_widget_types.h"
+
+namespace aura {
+class RootWindow;
+namespace client {
+
+class AURA_EXPORT HostWindowManagerClient {
+ public:
+  virtual gfx::NativeWindow OnHostWindowCreated(
+      const gfx::Rect& bounds, bool decorated) = 0;
+  virtual void OnHostWindowDestroyed(gfx::NativeWindow window) = 0;
+  virtual void OnHostWindowMovedOrResized(
+      gfx::NativeWindow window, const gfx::Rect& bounds) = 0;
+  virtual void OnHostWindowMovedOrResizedConstrained(
+      gfx::NativeWindow window, const gfx::Rect& bounds) = 0;
+  virtual void OnHostWindowVisibilityChanged(
+      gfx::NativeWindow window, bool visible) = 0;
+  virtual RootWindow* GetRootWindow() = 0;
+
+ protected:
+  virtual ~HostWindowManagerClient() {}
+};
+
+}  // namespace client
+}  // namespace aura
+
+#endif  // UI_AURA_HOSTWM_HOST_WINDOW_MANAGER_CLIENT_H_