DataReductionProxyConfigTest components_unittests failing on chromium.memory/Linux CFI

Builders failed on: 
- Linux CFI: 
  https://build.chromium.org/p/chromium.memory/builders/Linux%20CFI

fyi:
https://build.chromium.org/p/chromium.memory/builders/Linux%20CFI/builds/3699

[ RUN      ] DataReductionProxyConfigTest.WarmupURL
../../components/data_reduction_proxy/core/browser/data_reduction_proxy_test_utils.cc:689:10: runtime error: control flow integrity check for type 'data_reduction_proxy::MockDataReductionProxyConfig' failed during cast to unrelated type (vtable address 0x000000e96740)
0x000000e96740: note: vtable is of type 'data_reduction_proxy::TestDataReductionProxyConfig'
 00 00 00 00  c0 b9 60 0c 00 00 00 00  c0 de 64 0c 00 00 00 00  e0 de 64 0c 00 00 00 00  50 e1 64 0c
              ^
    #0 0xc661b24 in data_reduction_proxy::DataReductionProxyTestContext::mock_config() const components/data_reduction_proxy/core/browser/data_reduction_proxy_test_utils.cc:689:10
    #1 0x5c27b28 in data_reduction_proxy::DataReductionProxyConfigTest::ResetSettings() components/data_reduction_proxy/core/browser/data_reduction_proxy_config_unittest.cc:142:26
    #2 0x5c2e981 in data_reduction_proxy::DataReductionProxyConfigTest::SetUp() components/data_reduction_proxy/core/browser/data_reduction_proxy_config_unittest.cc:126:5
    #3 0x63a2bac in testing::Test::Run() third_party/googletest/src/googletest/src/gtest.cc:2468:3
    #4 0x63a347d in testing::TestInfo::Run() third_party/googletest/src/googletest/src/gtest.cc:2654:11
    #5 0x63a3cd1 in testing::TestCase::Run() third_party/googletest/src/googletest/src/gtest.cc:2772:28
    #6 0x63a9132 in testing::internal::UnitTestImpl::RunAllTests() third_party/googletest/src/googletest/src/gtest.cc:4677:43
    #7 0x63a8dfc in testing::UnitTest::Run() third_party/googletest/src/googletest/src/gtest.cc:4285:10
    #8 0x9a9471c in base::TestSuite::Run() base/test/test_suite.cc:270:16
    #9 0x9a97f6f in base::(anonymous namespace)::LaunchUnitTestsInternal(base::RepeatingCallback<int ()> const&, unsigned long, int, bool, base::RepeatingCallback<void ()> const&) base/test/launcher/unit_test_launcher.cc:217:27
    #10 0x9a97e38 in base::LaunchUnitTests(int, char**, base::RepeatingCallback<int ()> const&) base/test/launcher/unit_test_launcher.cc:555:10
    #11 0x5a001f1 in main components/test/run_all_unittests.cc:20:10
    #12 0x7f42a4b3ef44 in __libc_start_main /build/eglibc-SvCtMH/eglibc-2.19/csu/libc-start.c:287:0
    #13 0x42a2029 in _start ??:0:0

Suspect r516088