Use EGL_ANGLE_surface_orientation in Chrome to avoid a blit.

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 b5082992873569155cfd6402ac5f28a620d5b98a..a65d00fa4c8f9e95d77ef33de7ec998a1c9cf5dc 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder.cc
@@ -3140,6 +3140,8 @@ Capabilities GLES2DecoderImpl::GetCapabilities() {
   caps.commit_overlay_planes = supports_commit_overlay_planes_;
   caps.image = true;
   caps.surfaceless = surfaceless_;
+  bool is_offscreen = !!offscreen_target_frame_buffer_.get();
+  caps.flips_vertically = !is_offscreen && surface_->FlipsVertically();
 
   caps.blend_equation_advanced =
       feature_info_->feature_flags().blend_equation_advanced;