https://ci.chromium.org/buildbot/chromium.fyi/Libfuzzer%20Upload%20Mac%20ASan/32106

FAILED: swiftshader_vertex_routine_fuzzer swiftshader_vertex_routine_fuzzer.dSYM swiftshader_vertex_routine_fuzzer.dSYM/Contents/Info.plist swiftshader_vertex_routine_fuzzer.dSYM/Contents/Resources/DWARF/swiftshader_vertex_routine_fuzzer 
export DEVELOPER_DIR=/b/c/builder/Libfuzzer_Upload_Mac_ASan/src/build/mac_files/Xcode.app;  TOOL_VERSION=1536589911 ../../build/toolchain/mac/linker_driver.py ../../third_party/llvm-build/Release+Asserts/bin/clang++  -Wcrl,dsym,.  -stdlib=libc++ -arch x86_64 -segprot PROTECTED_MEMORY rw r -Werror -Wl,-dead_strip -isysroot ../../build/mac_files/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk -mmacosx-version-min=10.9.0 -fsanitize=address -fno-sanitize-address-use-after-scope -fsanitize=fuzzer-no-link -Wl,-ObjC -Wl,-U,_LLVMFuzzerCustomMutator -Wl,-U,_LLVMFuzzerInitialize -Wl,-U,_sanitizer_options_link_helper -fsanitize=address -fno-sanitize-address-use-after-scope -fsanitize=fuzzer-no-link -o "./swiftshader_vertex_routine_fuzzer" -Wl,-filelist,"./swiftshader_vertex_routine_fuzzer.rsp"  -framework Quartz -framework Cocoa
Undefined symbols for architecture x86_64:
  "_IOSurfaceUnlock", referenced from:
      egl::ClientBuffer::unlock() in Image.o
      egl::ClientBufferImage::lockInternal(int, int, int, sw::Lock, sw::Accessor) in Image.o
      egl::ClientBufferImage::unlockInternal() in Image.o
      egl::ClientBufferImage::unlock() in Image.o
  "_IOSurfaceLock", referenced from:
      egl::ClientBuffer::lock(int, int, int) in Image.o
  "_IOSurfaceGetHeightOfPlane", referenced from:
      egl::ClientBuffer::lock(int, int, int) in Image.o
  "_IOSurfaceGetBaseAddressOfPlane", referenced from:
      egl::ClientBuffer::lock(int, int, int) in Image.o
  "_IOSurfaceGetBytesPerRowOfPlane", referenced from:
      egl::ClientBuffer::pitchP() const in Image.o
      egl::ClientBuffer::lock(int, int, int) in Image.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

capn, could you please help take a look?