observed in https://logs.chromium.org/v/?s=chromium%2Fbb%2Ftryserver.chromium.android%2Fandroid_arm64_dbg_recipe%2F461770%2F%2B%2Frecipes%2Fsteps%2Fcompile__with_patch_%2F0%2Fstdout

[3922/46790] CXX obj/services/network/public/mojom/udp_socket_interface/udp_socket.mojom.o
FAILED: obj/services/network/public/mojom/udp_socket_interface/udp_socket.mojom.o 
/b/c/goma_client/gomacc ../../third_party/llvm-build/Release+Asserts/bin/clang++ -MMD -MF obj/services/network/public/mojom/udp_socket_interface/udp_socket.mojom.o.d -DV8_DEPRECATION_WARNINGS -DNO_TCMALLOC -DSAFE_BROWSING_DB_REMOTE -DCHROMIUM_BUILD -DFIELDTRIAL_TESTING_ENABLED -DANDROID -DHAVE_SYS_UIO_H -DANDROID_NDK_VERSION_ROLL=r16_1 -DCR_CLANG_REVISION=\"327688-1\" -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -DCOMPONENT_BUILD -D__GNU_SOURCE=1 -DCHROMIUM_CXX_TWEAK_INLINES -D_DEBUG -DDYNAMIC_ANNOTATIONS_ENABLED=1 -DWTF_USE_DYNAMIC_ANNOTATIONS=1 -DGOOGLE_PROTOBUF_NO_RTTI -DGOOGLE_PROTOBUF_NO_STATIC_INITIALIZER -DHAVE_PTHREAD -DPROTOBUF_USE_DLLS -DBORINGSSL_SHARED_LIBRARY -I../.. -Igen -I../../third_party/protobuf/src -Igen/protoc_out -I../../third_party/protobuf/src -I../../third_party/boringssl/src/include -fno-strict-aliasing --param=ssp-buffer-size=4 -fstack-protector -Wno-builtin-macro-redefined -D__DATE__= -D__TIME__= -D__TIMESTAMP__= -funwind-tables -fPIC -pipe -fcolor-diagnostics -fdebug-prefix-map=/b/c/b/android_arm64_dbg_recipe/src/out/Debug=. -no-canonical-prefixes -ffunction-sections -fno-short-enums --target=aarch64-linux-android -isystem../../third_party/android_ndk/sysroot/usr/include/aarch64-linux-android -D__ANDROID_API__=21 -D__NDK_FPABI__= -Wall -Werror -Wextra -Wimplicit-fallthrough -Wthread-safety -Wno-missing-field-initializers -Wno-unused-parameter -Wno-c++11-narrowing -Wno-covered-switch-default -Wno-unneeded-internal-declaration -Wno-inconsistent-missing-override -Wno-undefined-var-template -Wno-nonportable-include-path -Wno-address-of-packed-member -Wno-unused-lambda-capture -Wno-user-defined-warnings -Wno-enum-compare-switch -Wno-null-pointer-arithmetic -Oz -fno-ident -fdata-sections -ffunction-sections -fno-omit-frame-pointer -g0 -fvisibility=hidden -Xclang -load -Xclang ../../third_party/llvm-build/Release+Asserts/lib/libFindBadConstructs.so -Xclang -add-plugin -Xclang find-bad-constructs -Xclang -plugin-arg-find-bad-constructs -Xclang check-ipc -Wheader-hygiene -Wstring-conversion -Wtautological-overlap-compare -Wno-undefined-bool-conversion -Wno-tautological-undefined-compare -std=gnu++14 -fno-exceptions -fno-rtti -isystem../../third_party/android_ndk/sources/cxx-stl/llvm-libc++/include -isystem../../third_party/android_ndk/sources/cxx-stl/llvm-libc++abi/include -isystem../../third_party/android_ndk/sources/android/support/include --sysroot=../../third_party/android_ndk/sysroot -fvisibility-inlines-hidden -c gen/services/network/public/mojom/udp_socket.mojom.cc -o obj/services/network/public/mojom/udp_socket_interface/udp_socket.mojom.o
In file included from gen/services/network/public/mojom/udp_socket.mojom.cc:35:
In file included from ../../services/network/public/cpp/mutable_network_traffic_annotation_tag_mojom_traits.h:8:
../../mojo/common/common_custom_types_struct_traits.h:16:10: fatal error: 'mojo/public/mojom/base/unguessable_token.mojom-shared.h' file not found
#include "mojo/public/mojom/base/unguessable_token.mojom-shared.h"
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.