[Command buffer]: we can call blitFramebuffer directly from multi-sampled srgb image to srgb image

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 8ae668f5d7615483b9a024a4df8a7122f2d5b8d8..692542ecc7f5f2f7e998f2879abce75bfa98ef1c 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder.cc
@@ -7709,8 +7709,6 @@ void GLES2DecoderImpl::DoBlitFramebufferCHROMIUM(
   bool encode_srgb_only =
       (draw_buffers_has_srgb && !read_buffer_has_srgb) &&
       ((mask & GL_COLOR_BUFFER_BIT) != 0);
-  // TODO(yunchao) Need to revisit here if the read buffer is a multi-sampled
-  // renderbuffer.

[piman, 2016/09/20 20:55:25]

As discussed in that other CL, there is just one more check to add, which is
that the destination must not be multisampled.

   if (!enable_srgb ||
       read_buffer_samples > 0 ||
       !feature_info_->feature_flags().desktop_srgb_support ||