ui: Remove GLImageGLX.

ui/gl/gl_image_glx.h

-// Copyright (c) 2012 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_GL_IMAGE_GLX_H_
-#define UI_GL_GL_IMAGE_GLX_H_
-
-#include "ui/gfx/size.h"
-#include "ui/gfx/x/x11_types.h"
-#include "ui/gl/gl_export.h"
-#include "ui/gl/gl_image.h"
-
-namespace gfx {
-
-class GL_EXPORT GLImageGLX : public GLImage {
- public:
-  GLImageGLX(const gfx::Size& size, unsigned internalformat);
-
-  bool Initialize(XID pixmap);
-
-  // Overridden from GLImage:
-  void Destroy(bool have_context) override;
-  gfx::Size GetSize() override;
-  bool BindTexImage(unsigned target) override;
-  void ReleaseTexImage(unsigned target) override;
-  bool CopyTexImage(unsigned target) override;
-  void WillUseTexImage() override {}
-  void DidUseTexImage() override {}
-  void WillModifyTexImage() override {}
-  void DidModifyTexImage() override {}
-  bool ScheduleOverlayPlane(gfx::AcceleratedWidget widget,
-                            int z_order,
-                            OverlayTransform transform,
-                            const Rect& bounds_rect,
-                            const RectF& crop_rect) override;
-
- protected:
-  ~GLImageGLX() override;
-
- private:
-  XID glx_pixmap_;
-  const gfx::Size size_;
-  unsigned internalformat_;
-
-  DISALLOW_COPY_AND_ASSIGN(GLImageGLX);
-};
-
-}  // namespace gfx
-
-#endif  // UI_GL_GL_IMAGE_GLX_H_