Restore aura support from Mojo repo.

mandoline/ui/aura/window_tree_host_mojo.h

Index: mandoline/ui/aura/window_tree_host_mojo.h
diff --git a/mandoline/ui/aura/window_tree_host_mojo.h b/mandoline/ui/aura/window_tree_host_mojo.h
new file mode 100644
index 0000000000000000000000000000000000000000..ba38f51af992ac67e8ded7b93363e543f0ad9e99
--- /dev/null
+++ b/mandoline/ui/aura/window_tree_host_mojo.h
@@ -0,0 +1,75 @@
+// Copyright 2015 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 MANDOLINE_UI_AURA_WINDOW_TREE_HOST_MOJO_H_
+#define MANDOLINE_UI_AURA_WINDOW_TREE_HOST_MOJO_H_
+
+#include "base/macros.h"
+#include "components/view_manager/public/cpp/view_observer.h"
+#include "ui/aura/window_tree_host.h"
+#include "ui/events/event_source.h"
+#include "ui/gfx/geometry/rect.h"
+
+class SkBitmap;
+
+namespace ui {
+class Compositor;
+}
+
+namespace mojo {
+class Shell;
+}
+
+namespace mandoline {
+
+class SurfaceContextFactory;
+
+class WindowTreeHostMojo : public aura::WindowTreeHost,
+                           public ui::EventSource,
+                           public mojo::ViewObserver {
+ public:
+  WindowTreeHostMojo(mojo::Shell* shell, mojo::View* view);
+  ~WindowTreeHostMojo() override;
+
+  const gfx::Rect& bounds() const { return bounds_; }
+
+  ui::EventDispatchDetails SendEventToProcessor(ui::Event* event) {
+    return ui::EventSource::SendEventToProcessor(event);
+  }
+
+ private:
+  // WindowTreeHost:
+  ui::EventSource* GetEventSource() override;
+  gfx::AcceleratedWidget GetAcceleratedWidget() override;
+  void Show() override;
+  void Hide() override;
+  gfx::Rect GetBounds() const override;
+  void SetBounds(const gfx::Rect& bounds) override;
+  gfx::Point GetLocationOnNativeScreen() const override;
+  void SetCapture() override;
+  void ReleaseCapture() override;
+  void SetCursorNative(gfx::NativeCursor cursor) override;
+  void MoveCursorToNative(const gfx::Point& location) override;
+  void OnCursorVisibilityChangedNative(bool show) override;
+
+  // ui::EventSource:
+  ui::EventProcessor* GetEventProcessor() override;
+
+  // mojo::ViewObserver:
+  void OnViewBoundsChanged(mojo::View* view,
+                           const mojo::Rect& old_bounds,
+                           const mojo::Rect& new_bounds) override;
+
+  mojo::View* view_;
+
+  gfx::Rect bounds_;
+
+  scoped_ptr<SurfaceContextFactory> context_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(WindowTreeHostMojo);
+};
+
+}  // namespace mandoline
+
+#endif  // MANDOLINE_UI_AURA_WINDOW_TREE_HOST_MOJO_H_