Mus version of GLHelper

components/mus/gles2/gl_helper.h

Index: components/mus/gles2/gl_helper.h
diff --git a/components/mus/gles2/gl_helper.h b/components/mus/gles2/gl_helper.h
new file mode 100644
index 0000000000000000000000000000000000000000..e067cb3accd9f0ff4a08bd671ff7dff9e6aea9da
--- /dev/null
+++ b/components/mus/gles2/gl_helper.h
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+// Copyright (c) 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 COMPONENTS_MUS_GLES2_GL_HELPER_H_
+#define COMPONENTS_MUS_GLES2_GL_HELPER_H_
+
+#include "gpu/command_buffer/client/gles2_interface.h"
+
+class SkRegion;
+
+namespace mus {
+
+void GLCopySubBufferDamage(gpu::gles2::GLES2Interface* gl,
+                           GLenum target,
+                           GLuint texture,
+                           GLuint previous_texture,
+                           const SkRegion& new_damage,
+                           const SkRegion& old_damage);
+
+}  // namespace mus
+
+#endif  // COMPONENTS_MUS_GLES2_GL_HELPER_H_