components: Add Exosphere component.

components/exo/display.h

Index: components/exo/display.h
diff --git a/components/exo/display.h b/components/exo/display.h
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+++ b/components/exo/display.h
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+// 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 COMPONENTS_EXO_DISPLAY_H_
+#define COMPONENTS_EXO_DISPLAY_H_
+
+#include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/shared_memory_handle.h"
+
+namespace exo {
+class SharedMemory;
+class ShellSurface;
+class Surface;
+
+// The core display class. This class provides functions for creating surfaces
+// and is in charge of combining the contents of multiple surfaces into one
+// displayable output.
+class Display {
+ public:
+  Display();
+  ~Display();
+
+  // Creates a new surface.
+  scoped_ptr<Surface> CreateSurface();
+
+  // Creates a shared memory segment from |handle| of |size| with the
+  // given |id|. This function takes ownership of |handle|.
+  scoped_ptr<SharedMemory> CreateSharedMemory(
+      const base::SharedMemoryHandle& handle,
+      size_t size);
+
+  // Creates a shell surface for an existing surface.
+  scoped_ptr<ShellSurface> CreateShellSurface(Surface* surface);
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(Display);
+};
+
+}  // namespace exo
+
+#endif  // COMPONENTS_EXO_DISPLAY_H_