Deleted code associated with --enable-gpu-rendering and...

chrome/gpu/gpu_backing_store_glx_context.h

-// Copyright (c) 2010 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 CHROME_GPU_GPU_BACKING_STORE_GLX_CONTEXT_H_
-#define CHROME_GPU_GPU_BACKING_STORE_GLX_CONTEXT_H_
-#pragma once
-
-#include "base/basictypes.h"
-#include "chrome/gpu/x_util.h"
-#include "gfx/size.h"
-
-class GpuThread;
-
-
-class GpuBackingStoreGLXContext {
- public:
-  explicit GpuBackingStoreGLXContext(GpuThread* gpu_thread);
-  ~GpuBackingStoreGLXContext();
-
-  // Returns the context, creating it if necessary, and binding it to the given
-  // display and window identified by the XID. This will avoid duplicate calls
-  // to MakeCurrent if the display/XID hasn't changed from the last call.
-  // Returns NULL on failure.
-  GLXContext BindContext(XID window_id);
-
-  bool BindTextureForScrolling(XID window_id,
-                               const gfx::Size& size);
-
-  unsigned int SwapTextureForScrolling(unsigned int old_texture,
-                                       const gfx::Size& old_size);
-
- private:
-  GpuThread* gpu_thread_;
-
-  // Set to true when we've tried to create the context. This prevents us from
-  // trying to initialize the OpenGL context over and over in the failure case.
-  bool tried_to_init_;
-
-  // The OpenGL context. Non-NULL when initialized.
-  GLXContext context_;
-
-  // The last window we've bound our context to. This allows us to avoid
-  // duplicate "MakeCurrent" calls which are expensive.
-  XID previous_window_id_;
-
-  // The frame buffer object we use to render scrolled images into. We'll set
-  // is_frame_buffer_bound_ when the FBO is bound so we can perform some checks
-  // to make sure we're not forgetting to unbind it.
-  unsigned int frame_buffer_for_scrolling_;
-  bool is_frame_buffer_bound_;
-
-  // The temporary texture we use for scrolling. The ID will be 0 if it is
-  // uninitialized. Otherwise, this will give the ID and size of an existing
-  // texture that can be re-used for a temporary buffer for scrolling.
-  unsigned int temp_scroll_texture_id_;
-  gfx::Size temp_scroll_texture_size_;
-
-  DISALLOW_COPY_AND_ASSIGN(GpuBackingStoreGLXContext);
-};
-
-#endif  // CHROME_GPU_GPU_BACKING_STORE_GLX_CONTEXT_H_