aura: Add X11 host window management.

ash/hostwm/host_window_manager.h

Index: ash/hostwm/host_window_manager.h
diff --git a/ash/hostwm/host_window_manager.h b/ash/hostwm/host_window_manager.h
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index 0000000000000000000000000000000000000000..3d85fe5d2dd650c802e6c80658987cfded978734
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+++ b/ash/hostwm/host_window_manager.h
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+// 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 ASH_HOSTWM_HOST_WINDOW_MANAGER_H_
+#define ASH_HOSTWM_HOST_WINDOW_MANAGER_H_
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "ui/aura/hostwm/host_window_manager_client.h"
+
+#include <map>
+
+namespace aura {
+class RootWindow;
+}
+
+namespace views {
+class Widget;
+}
+
+namespace ash {
+class HostWindowContainer;
+
+namespace internal {
+
+class HostWindowManager : public aura::client::HostWindowManagerClient {
+ public:
+  HostWindowManager() {}
+  virtual ~HostWindowManager() {}
+
+  // Overridden from aura::client::HostWindowManagerClient:
+  virtual gfx::NativeWindow OnHostWindowCreated(
+      const gfx::Rect& bounds, bool decorated) OVERRIDE;
+  virtual void OnHostWindowDestroyed(gfx::NativeWindow window) OVERRIDE;
+  virtual void OnHostWindowMovedOrResized(
+      gfx::NativeWindow window, const gfx::Rect& bounds) OVERRIDE;
+  virtual void OnHostWindowMovedOrResizedConstrained(
+      gfx::NativeWindow window, const gfx::Rect& bounds) OVERRIDE;
+  virtual void OnHostWindowVisibilityChanged(
+      gfx::NativeWindow window, bool visible) OVERRIDE;
+  virtual aura::RootWindow* GetRootWindow() OVERRIDE;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(HostWindowManager);
+};
+
+}  // namespace internal
+}  // namespace ash
+
+#endif  // ASH_HOSTWM_HOST_WINDOW_MANAGER_H_