ui/gl: Move GLImage into gl namespace.

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/geometry/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 {
+class GL_EXPORT GLImageGLX : public gl::GLImage {
  public:
   GLImageGLX(const Size& size, unsigned internalformat);
 
   bool Initialize(XID pixmap);
 
   // Overridden from GLImage:
   void Destroy(bool have_context) override;
   Size GetSize() override;
   unsigned GetInternalFormat() override;
   bool BindTexImage(unsigned target) override;
@@ skipping 18 matching lines @@
   XID glx_pixmap_;
   const Size size_;
   unsigned internalformat_;
 
   DISALLOW_COPY_AND_ASSIGN(GLImageGLX);
 };
 
 }  // namespace gfx
 
 #endif  // UI_GL_GL_IMAGE_GLX_H_