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

gpu/command_buffer/service/gles2_cmd_decoder.cc

Index: gpu/command_buffer/service/gles2_cmd_decoder.cc
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder.cc b/gpu/command_buffer/service/gles2_cmd_decoder.cc
index bd7bed5278f045b9e79c7fbbed2eba291918d3fc..d53d1cabdccd11691a8e43541c5eedb937695265 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder.cc
@@ -8070,6 +8070,18 @@ void GLES2DecoderImpl::DoBlitFramebufferCHROMIUM(
     }
   }
 
+  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);