Trying to build ToT android with gn args:
is_component_build = true
use_goma = true
goma_dir = "~/tools/goma"
target_os = "android"
target_cpu = "arm"
android_full_debug = true
is_debug = true

I get this error:

[3514/3514] SOLINK ./libmedia.cr.so
FAILED: python "/usr/local/google/home/avallee/src/chromium/src/build/toolchain/gcc_solink_wrapper.py" --readelf="../../third_party/android_tools/ndk/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-readelf" --nm="../../third_party/android_tools/ndk/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-nm" --strip=../../third_party/android_tools/ndk/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-strip --sofile="./lib.unstripped/libmedia.cr.so" --tocfile="./libmedia.cr.so.TOC" --output="./libmedia.cr.so" -- ../../third_party/android_tools/ndk/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-g++ -shared -Wl,--fatal-warnings -fPIC -Wl,-z,noexecstack -Wl,-z,now -Wl,-z,relro -Wl,-z,defs -fuse-ld=gold -Wl,--no-undefined -Wl,--exclude-libs=libgcc.a -Wl,--exclude-libs=libc++_static.a -Wl,--exclude-libs=libvpx_assembly_arm.a -Wl,--icf=all -nostdlib -Wl,--warn-shared-textrel --sysroot=../../third_party/android_tools/ndk/platforms/android-16/arch-arm  -L../../third_party/android_tools/ndk/sources/cxx-stl/llvm-libc++/libs/armeabi-v7a -o "./lib.unstripped/libmedia.cr.so" -Wl,-soname="libmedia.cr.so" @"./libmedia.cr.so.rsp"
../../third_party/skia/include/gpu/../private/../private/SkSpinlock.h:19: error: undefined reference to 'SkSpinlock::contendedAcquire()'