In https://build.chromium.org/p/chromium.chromiumos/builders/Linux%20ChromiumOS%20Builder%20%28dbg%29/builds/80536, compile failed with:

[28351/28641] LINK ./chrome
FAILED: chrome 
../../third_party/llvm-build/Release+Asserts/bin/clang++ -pie -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=gold -B../../third_party/binutils/Linux_x64/Release/bin -Wl,--threads -Wl,--thread-count=4 -Wl,--icf=all -pthread -m64 --sysroot=../../build/linux/ubuntu_precise_amd64-sysroot -L/b/c/b/linux_chromeos/src/build/linux/ubuntu_precise_amd64-sysroot/lib/x86_64-linux-gnu -Wl,-rpath-link=/b/c/b/linux_chromeos/src/build/linux/ubuntu_precise_amd64-sysroot/lib/x86_64-linux-gnu -L/b/c/b/linux_chromeos/src/build/linux/ubuntu_precise_amd64-sysroot/usr/lib/x86_64-linux-gnu -Wl,-rpath-link=/b/c/b/linux_chromeos/src/build/linux/ubuntu_precise_amd64-sysroot/usr/lib/x86_64-linux-gnu -L/b/c/b/linux_chromeos/src/build/linux/ubuntu_precise_amd64-sysroot/usr/lib/gcc/x86_64-linux-gnu/4.6 -Wl,-rpath-link=/b/c/b/linux_chromeos/src/build/linux/ubuntu_precise_amd64-sysroot/usr/lib/gcc/x86_64-linux-gnu/4.6 -L/b/c/b/linux_chromeos/src/build/linux/ubuntu_precise_amd64-sysroot/usr/lib -Wl,-rpath-link=/b/c/b/linux_chromeos/src/build/linux/ubuntu_precise_amd64-sysroot/usr/lib -Wl,-rpath-link=. -Wl,--disable-new-dtags -Wl,-rpath=\$ORIGIN/. -Wl,-rpath-link=. -Wl,--export-dynamic -o "./chrome" -Wl,--start-group @"./chrome.rsp" ./libbase.so ./libskia.so ./libbindings.so ./libmojo_public_system_cpp.so ./libmojo_public_system.so ./liburl.so ./libbase_i18n.so ./libicui18n.so ./libicuuc.so ./libnet.so ./libprotobuf_lite.so ./libcrcrypto.so ./libboringssl.so ./libgfx.so ./libgeometry.so ./librange.so ./libui_base.so ./libui_data_pack.so ./libevents_base.so ./libplatform.so ./libkeycodes_x11.so ./libui_base_x.so ./libprefs.so ./libipc.so ./liburl_ipc.so ./libcontent.so ./libgpu.so ./libgles2_utils.so ./libgl_wrapper.so ./libgl_init.so ./libmedia.so ./libshared_memory_support.so ./libmojo_common_lib.so ./libgfx_ipc.so ./libgfx_ipc_geometry.so ./libgfx_ipc_skia.so ./libcc.so ./libdisplay.so ./libcapture.so ./libcc_ipc.so ./libcc_surfaces.so ./libaccessibility.so ./libgfx_ipc_color.so ./libsurface.so ./libkeyed_service_core.so ./libwebdata_common.so ./libsql.so ./libchromeos.so ./libdbus.so ./libcloud_policy_proto_generated_compile.so ./libpolicy_component.so ./libpolicy_proto.so ./libcommon.so ./libgin.so ./libv8.so ./libmojo_system_impl.so ./libmessage_center.so ./libppapi_shared.so ./libdevice_event_log.so ./libdevice_base.so ./liburl_matcher.so ./libbluetooth.so ./libkeyboard_with_content.so ./libprinting.so ./libsandbox_services.so ./libnative_theme.so ./libkeyed_service_content.so ./libsessions.so ./libonc.so ./libpower_save_blocker.so ./libaura.so ./libviews.so ./libui_base_ime.so ./libcompositor.so ./libevents.so ./libwm.so ./libuser_prefs.so ./libgeolocation.so ./libchromium_sqlite3.so ./libgcm.so ./libproxy_config.so ./libstorage_browser.so ./libstorage_common.so ./libshell_dialogs.so ./libchrome_apps.so ./libuser_manager.so ./libffmpeg.so ./libppapi_host.so ./libash.so ./libapp_list.so ./libui_chromeos.so ./libfile_manager.so ./libx11_events_platform.so ./libdevices.so ./libevents_devices_x11.so ./libevents_x.so ./libgfx_x11.so ./libkeyboard.so ./libwebview.so ./libdomain_reliability.so ./libstartup_tracing.so ./libnet_with_v8.so ./libgesture_detection.so ./libsnapshot.so ./libweb_dialogs.so ./libppapi_proxy.so ./libsuid_sandbox_client.so ./libwallpaper.so ./libash_with_content.so ./libdevice_gamepad.so ./libgles2_implementation.so ./libui_views_mus_lib.so ./liblogin.so ./libownership.so ./libcore.so ./libpresenter.so ./libbrowser_ui_views.so ./libcaptive_portal.so ./libmidi.so ./libmedia_gpu.so ./libblink_common.so ./libblink_platform.so ./libgles2_c_lib.so ./libwtf.so ./libblink_web.so ./libseccomp_bpf.so ./libjs.so ./libv8_libplatform.so ./libtouch_hud.so ./libdisplay_compositor.so ./libdisplay_types.so ./libstub_window.so ./libx11_window.so ./libmojo_ime_lib.so ./libevents_ozone_layout.so -Wl,--end-group  -ldl -lrt -lpangocairo-1.0 -lpango-1.0 -lcairo -lgobject-2.0 -lglib-2.0 -lX11 -lX11-xcb -lxcb -lXcomposite -lXcursor -lXdamage -lXext -lXfixes -lXi -lXrender -lXtst -lgmodule-2.0 -lgthread-2.0 -lnss3 -lnssutil3 -lsmime3 -lplds4 -lplc4 -lnspr4 -ldbus-1 -lpthread -lexpat -lfontconfig -lXrandr -lm -lffi -lfreetype 
../../chrome/browser/notifications/message_center_settings_controller.cc:136: error: undefined reference to 'arc::ArcApplicationNotifierSourceChromeOS::ArcApplicationNotifierSourceChromeOS(NotifierSource::Observer*)'
clang: error: linker command failed with exit code 1 (use -v to see invocation)


But in the following cycle, compile passed.