[Not For Revew] reverse src/dst coordinates if both src and dst coordinates are reversed

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 <limits.h>
 #include <stddef.h>
 #include <stdint.h>
 #include <stdio.h>
@@ skipping 8052 matching lines @@
       srcY1 = srcY0 < srcY1 ?
           src_bounds.y() + src_bounds.height() : src_bounds.y();
 
       dstX0 = dstX0 < dstX1 ? dst_mapping_x0 : dst_mapping_x1;
       dstY0 = dstY0 < dstY1 ? dst_mapping_y0 : dst_mapping_y1;
       dstX1 = dstX0 < dstX1 ? dst_mapping_x1 : dst_mapping_x0;
       dstY1 = dstY0 < dstY1 ? dst_mapping_y1 : dst_mapping_y0;
     }
   }
 
+  if (srcX0 > srcX1 && dstX0 > dstX1) {
+    GLint temp;
+    temp = srcX1, srcX1 = srcX0, srcX0 = temp;
+    temp = dstX1, dstX1 = dstX0, dstX0 = temp;
+  }
+
+  if (srcY0 > srcY1 && dstY0 > dstY1) {
+    GLint temp;
+    temp = srcY1, srcY1 = srcY0, srcY0 = temp;
+    temp = dstY1, dstY1 = dstY0, dstY0 = temp;
+  }
+
   bool enable_srgb =
       (read_buffer_has_srgb || draw_buffers_has_srgb) &&
       ((mask & GL_COLOR_BUFFER_BIT) != 0);
   bool encode_srgb_only =
       (draw_buffers_has_srgb && !read_buffer_has_srgb) &&
       ((mask & GL_COLOR_BUFFER_BIT) != 0);
   if (!enable_srgb ||
       read_buffer_samples > 0 ||
       !feature_info_->feature_flags().desktop_srgb_support ||
       gl_version_info().IsAtLeastGL(4, 4) ||
@@ skipping 10677 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 "base/macros.h"
 #include "gpu/command_buffer/service/gles2_cmd_decoder_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu