gpu: Add support for GLX_EXT_texture_from_pixmap extension.

ui/gl/gl_image_glx.h

Index: ui/gl/gl_image_glx.h
diff --git a/ui/gl/gl_image_glx.h b/ui/gl/gl_image_glx.h
new file mode 100644
index 0000000000000000000000000000000000000000..fd940c968ce0eaf3782acb3ac1e9e94547b7ae58
--- /dev/null
+++ b/ui/gl/gl_image_glx.h
@@ -0,0 +1,39 @@
+// 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/base/x/x11_util.h"
+#include "ui/gfx/size.h"
+#include "ui/gl/gl_export.h"
+#include "ui/gl/gl_image.h"
+
+namespace gfx {
+
+class GL_EXPORT PixmapGLImageGLX : public GLImage {
+ public:
+  PixmapGLImageGLX();
+
+  // Implement GLImage.
+  virtual bool Initialize(GLSurface* compatible_surface) OVERRIDE;
+  virtual void Destroy() OVERRIDE;
+  virtual gfx::Size GetSize() OVERRIDE;
+  virtual bool RebindPixmap(GLuint pixmap) OVERRIDE;
+
+ protected:
+  virtual ~PixmapGLImageGLX();
+
+ private:
+  Display* display_;
+  XID pixmap_;
+  XID glx_pixmap_;
+  gfx::Size size_;
+
+  DISALLOW_COPY_AND_ASSIGN(PixmapGLImageGLX);
+};
+
+}  // namespace gfx
+
+#endif  // UI_GL_GL_IMAGE_GLX_H_