Adds WmLayoutManager and the aura wrapper AuraLayoutManagerAdapter

ash/wm/aura/aura_layout_manager_adapter.h

Index: ash/wm/aura/aura_layout_manager_adapter.h
diff --git a/ash/wm/aura/aura_layout_manager_adapter.h b/ash/wm/aura/aura_layout_manager_adapter.h
new file mode 100644
index 0000000000000000000000000000000000000000..88a05140566e1d321ecfb7752e3b6c5cdc5034e2
--- /dev/null
+++ b/ash/wm/aura/aura_layout_manager_adapter.h
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+// 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 ASH_WM_AURA_AURA_LAYOUT_MANAGER_ADAPTER_H_
+#define ASH_WM_AURA_AURA_LAYOUT_MANAGER_ADAPTER_H_
+
+#include <memory>
+
+#include "ash/ash_export.h"
+#include "base/macros.h"
+#include "ui/aura/layout_manager.h"
+
+namespace ash {
+namespace wm {
+
+class WmLayoutManager;
+
+// AuraLayoutManagerAdapter is an aura::LayoutManager that calls to
+// WmLayoutManager. Use it when you have a WmLayoutManager you want to use
+// with an aura::Window.
+class ASH_EXPORT AuraLayoutManagerAdapter : public aura::LayoutManager {
+ public:
+  explicit AuraLayoutManagerAdapter(
+      std::unique_ptr<WmLayoutManager> wm_layout_manager);
+  ~AuraLayoutManagerAdapter() override;
+
+  // aura::LayoutManager:
+  void OnWindowResized() override;
+  void OnWindowAddedToLayout(aura::Window* child) override;
+  void OnWillRemoveWindowFromLayout(aura::Window* child) override;
+  void OnWindowRemovedFromLayout(aura::Window* child) override;
+  void OnChildWindowVisibilityChanged(aura::Window* child,
+                                      bool visible) override;
+  void SetChildBounds(aura::Window* child,
+                      const gfx::Rect& requested_bounds) override;
+
+ private:
+  std::unique_ptr<WmLayoutManager> wm_layout_manager_;
+
+  DISALLOW_COPY_AND_ASSIGN(AuraLayoutManagerAdapter);
+};
+
+}  // namespace wm
+}  // namespace ash
+
+#endif  // ASH_WM_AURA_AURA_LAYOUT_MANAGER_ADAPTER_H_