glBindTexImage2DCHROMIUM should retain pixel format.

ui/gl/gl_image_glx.cc

 // 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.
 
 extern "C" {
 #include <X11/Xlib.h>
 }
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 150 matching lines @@
 
 void GLImageGLX::Destroy(bool have_context) {
   if (glx_pixmap_) {
     glXDestroyGLXPixmap(gfx::GetXDisplay(), glx_pixmap_);
     glx_pixmap_ = 0;
   }
 }
 
 gfx::Size GLImageGLX::GetSize() { return size_; }
 
+unsigned GLImageGLX::GetInternalFormat() { return internalformat_; }
+
 bool GLImageGLX::BindTexImage(unsigned target) {
   if (!glx_pixmap_)
     return false;
 
   // Requires TEXTURE_2D target.
   if (target != GL_TEXTURE_2D)
     return false;
 
   glXBindTexImageEXT(gfx::GetXDisplay(), glx_pixmap_, GLX_FRONT_LEFT_EXT, 0);
   return true;
@@ skipping 12 matching lines @@
 
 bool GLImageGLX::ScheduleOverlayPlane(gfx::AcceleratedWidget widget,
                                       int z_order,
                                       OverlayTransform transform,
                                       const Rect& bounds_rect,
                                       const RectF& crop_rect) {
   return false;
 }
 
 }  // namespace gfx