Add initial GpuMemoryBufferSurfaceTexture implementation.

ui/gl/android/surface_texture_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_ANDROID_SURFACE_TEXTURE_TRACKER_H_
+#define UI_GL_ANDROID_SURFACE_TEXTURE_TRACKER_H_
+
+#include "base/memory/ref_counted.h"
+#include "ui/gl/gl_export.h"
+
+namespace gfx {
+
+class SurfaceTexture;
+
+// This interface is used to take ownership of preallocated surface textures
+// with specific ids.
+class GL_EXPORT SurfaceTextureTracker {
+ public:
+  static SurfaceTextureTracker* GetInstance();
+  static void InitInstance(SurfaceTextureTracker* tracker);
+
+  virtual scoped_refptr<SurfaceTexture> AcquireSurfaceTexture(
+      int surface_texture_id) = 0;
+
+ protected:
+  virtual ~SurfaceTextureTracker() {}
+};
+
+}  // namespace gfx
+
+#endif  // UI_GL_ANDROID_SURFACE_TEXTURE_TRACKER_H_