gpu: Make CopyTexture work with GL_BGRA_EXT destination textures.

gpu/command_buffer/service/gles2_cmd_decoder.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.
 
 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
 
 #include <stdio.h>
 
 #include <algorithm>
 #include <list>
@@ skipping 10048 matching lines @@
   }
 
   GLenum source_type = 0;
   GLenum source_internal_format = 0;
   source_texture->GetLevelType(
       source_texture->target(), 0, &source_type, &source_internal_format);
 
   // The destination format should be GL_RGB, or GL_RGBA. GL_ALPHA,
   // GL_LUMINANCE, and GL_LUMINANCE_ALPHA are not supported because they are not
   // renderable on some platforms.
-  bool valid_dest_format =
-      internal_format == GL_RGB || internal_format == GL_RGBA;
+  bool valid_dest_format = internal_format == GL_RGB ||
+                           internal_format == GL_RGBA ||
+                           internal_format == GL_BGRA_EXT;
   bool valid_source_format = source_internal_format == GL_ALPHA ||
                              source_internal_format == GL_RGB ||
                              source_internal_format == GL_RGBA ||
                              source_internal_format == GL_LUMINANCE ||
                              source_internal_format == GL_LUMINANCE_ALPHA ||
                              source_internal_format == GL_BGRA_EXT;
   if (!valid_source_format || !valid_dest_format) {
     LOCAL_SET_GL_ERROR(GL_INVALID_OPERATION,
                        "glCopyTextureCHROMIUM",
                        "invalid internal format");
@@ skipping 935 matching lines @@
   }
 }
 
 // Include the auto-generated part of this file. We split this because it means
 // we can easily edit the non-auto generated parts right here in this file
 // instead of having to edit some template or the code generator.
 #include "gpu/command_buffer/service/gles2_cmd_decoder_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu