gpu: Remove Create/DeleteImage IPC by adding an X11_PIXMAP_BUFFER GpuMemoryBuffer type.

ui/gl/x11_pixmap_tracker.h

+// Copyright 2014 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_GL_X11_PIXMAP_TRACKER_H_
+#define UI_GL_X11_PIXMAP_TRACKER_H_
+
+#include "ui/gfx/x/x11_types.h"
+#include "ui/gl/gl_export.h"
+
+namespace gfx {
+
+// This interface is used to take ownership of preallocated pixmaps with
+// specific ids.
+class GL_EXPORT X11PixmapTracker {
+ public:
+  static X11PixmapTracker* GetInstance();
+  static void InitInstance(X11PixmapTracker* tracker);
+
+  virtual XID AcquirePixmap(int primary_id, int secondary_id) = 0;
+
+ protected:
+  virtual ~X11PixmapTracker() {}
+};
+
+}  // namespace gfx
+
+#endif  // UI_GL_X11_PIXMAP_TRACKER_H_