UserAgent: Mozilla/5.0 (Windows NT 5.1; rv:50.0) Gecko/20100101 Firefox/50.0

Steps to reproduce the problem:
1. cros chrome-sdk --board=arm-generic --nogoma
2. gn gen out_$SDK_BOARD/Release --args="$GN_ARGS"
3. ninja -C out_${SDK_BOARD}/Release -j9 chrome chrome_sandbox nacl_helper

What is the expected behavior?
build

What went wrong?
build log:

[19849/33033] CC v8_snapshot/obj/third_party/icu/icuuc/ucnvdisp.o
FAILED: v8_snapshot/obj/third_party/icu/icuuc/ucnvdisp.o
/home/oszi/chromium/src/third_party/llvm-build/Release+Asserts/bin/clang -MMD -MF v8_snapshot/obj/third_party/icu/icuuc/ucnvdisp.o.d -DU_COMMON_IMPLEMENTATION -DU_ICUDATAENTRY_IN_COMMON -DV8_DEPRECATION_WARNINGS -DENABLE_PDF=1 -DUSE_UDEV -DUI_COMPOSITOR_IMAGE_TRANSPORT -DUSE_AURA=1 -DUSE_NSS_CERTS=1 -DUSE_OZONE=1 -DFULL_SAFE_BROWSING -DSAFE_BROWSING_CSD -DSAFE_BROWSING_DB_LOCAL -DCHROMIUM_BUILD -DENABLE_MEDIA_ROUTER=1 -DFIELDTRIAL_TESTING_ENABLED -DCR_CLANG_REVISION=288545-1 -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -DNDEBUG -DNVALGRIND -DDYNAMIC_ANNOTATIONS_ENABLED=0 -DHAVE_DLOPEN=0 -DUCONFIG_ONLY_HTML_CONVERSION=1 -DU_CHARSET_IS_UTF8=1 -DU_USING_ICU_NAMESPACE=0 -DU_ENABLE_DYLOAD=0 -DU_STATIC_IMPLEMENTATION -DICU_UTIL_DATA_IMPL=ICU_UTIL_DATA_FILE -I../.. -Iv8_snapshot/gen -I../../third_party/icu/source/common -I../../third_party/icu/source/i18n -fno-strict-aliasing --param=ssp-buffer-size=4 -fstack-protector -funwind-tables -fPIC -pipe -B../../third_party/binutils/Linux_x64/Release/bin -fcolor-diagnostics -fdebug-prefix-map=/home/oszi/chromium/src=. -m32 -msse2 -mfpmath=sse -mmmx -momit-leaf-frame-pointer -pthread -mstack-alignment=16 -mstackrealign -O2 -fno-ident -fdata-sections -ffunction-sections -g2 -gsplit-dwarf -fvisibility=hidden -Wheader-hygiene -Wstring-conversion -Werror -Wall -Wno-unused-variable -Wno-missing-field-initializers -Wno-unused-parameter -Wno-c++11-narrowing -Wno-covered-switch-default -Wno-deprecated-register -Wno-unneeded-internal-declaration -Wno-inconsistent-missing-override -Wno-shift-negative-value -Wno-undefined-var-template -Wno-nonportable-include-path -Wno-address-of-packed-member -Wno-unused-function -Wno-deprecated-declarations -Wno-parentheses -Wno-unused-function  -c ../../third_party/icu/source/common/ucnvdisp.c -o v8_snapshot/obj/third_party/icu/icuuc/ucnvdisp.o
In file included from ../../third_party/icu/source/common/ucnvdisp.c:23:
In file included from ../../third_party/icu/source/common/unicode/utypes.h:38:
In file included from ../../third_party/icu/source/common/unicode/umachine.h:46:
In file included from ../../third_party/icu/source/common/unicode/ptypes.h:68:
In file included from /home/oszi/chromium/src/third_party/llvm-build/Release+Asserts/bin/../lib/clang/4.0.0/include/stdint.h:63:
In file included from /usr/include/stdint.h:25:
/usr/include/features.h:367:12: fatal error: 'sys/cdefs.h' file not found
#  include <sys/cdefs.h>
           ^~~~~~~~~~~~~
1 error generated.

Did this work before? N/A 

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