Build is failing with:

[5690/19312] SOLINK ./libprinting.so
FAILED: libprinting.so libprinting.so.TOC 
python "../../build/toolchain/gcc_solink_wrapper.py" --readelf="readelf" --nm="nm" --sofile="./libprinting.so" --tocfile="./libprinting.so.TOC" --output="./libprinting.so"  -- ../../third_party/llvm-build/Release+Asserts/bin/clang++ -shared -Wl,--fatal-warnings -fPIC -Wl,-z,noexecstack -Wl,-z,now -Wl,-z,relro -Wl,-z,defs -Wl,--no-as-needed -lpthread -Wl,--as-needed -fuse-ld=lld --target=x86_64-fuchsia -resource-dir ../../third_party/fuchsia-sdk/toolchain_libs/clang/6.0.0 -Wl,-z,stack-size=0x800000 -Wl,--no-as-needed -lfdio -Wl,--as-needed -m64 -Werror -Wl,--gdb-index -nostdlib++ --sysroot=../../third_party/fuchsia-sdk/sysroot/x86_64-fuchsia -o "./libprinting.so" -Wl,-soname="libprinting.so" @"./libprinting.so.rsp"
/b/c/builder/linux/src/out/Debug/../../third_party/llvm-build/Release+Asserts/bin/ld.lld: error: undefined symbol: SkDocument::MakePDF(SkWStream*, SkDocument::PDFMetadata const&)
>>> referenced by pdf_metafile_utils.cc
>>>               obj/printing/common/common/pdf_metafile_utils.o:(printing::MakePdfDocument(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, SkWStream*))
clang: error: ld.lld command failed with exit code 1 (use -v to see invocation)

the most likely-looking culprit CL was reed@'s simplification:
https://chromium.googlesource.com/chromium/src/+/04f8fb4901e8fe0319a94051d07c182dc92c050b