Adapted from Chromium.

Steps to upgrade to a new version of GRPC, all relative to this directory:

1. Update $FUCHSIA_DIR/integration/fuchsia/third_party/flower to reference a new GRPC revision.
2. Install prerequisites:

   sudo apt install python3-mako`
   

3. Rebuild BUILD.gn:

   git -C $FUCHSIA_DIR/third_party/grpc submodule update --init
   cp template/BUILD.fuchsia.gn.template $FUCHSIA_DIR/third_party/grpc/templates
   (cd $FUCHSIA_DIR/third_party/grpc && tools/buildgen/generate_projects.sh)
   rm $FUCHSIA_DIR/third_party/grpc/templates/BUILD.fuchsia.gn.template
   mv $FUCHSIA_DIR/third_party/grpc/BUILD.fuchsia.gn BUILD.gn
   fx gn format --in-place BUILD.gn
   git -C $FUCHSIA_DIR/third_party/grpc submodule deinit --all