Revert "SystemTokenCertDBInitializer test cases of ownership taken signal."

This reverts commit 78537960.

Reason for revert: the test is crashing: https://ci.chromium.org/p/chrome/builders/ci/linux-chromeos-chrome

Original change's description:
> SystemTokenCertDBInitializer test cases of ownership taken signal.
>
> This is the missing test coverage in unittests.
>
> Technically speaking, certain browser tests, e.g.,
> WebviewClientCertsTokenLoadingLoginTest also exercise the logic, but
> the code distance is very far and thus hard to debug. It makes sense for
> the its own unittests to test it first.
>
> BUG=b:172748724
> TEST=unit_tests.
>
> Change-Id: Ib293bdeb1c572172e611ce9a55da15a8a0349a87
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2581707
> Commit-Queue: Leo Lai <cylai@google.com>
> Reviewed-by: Achuith Bhandarkar <achuith@chromium.org>
> Reviewed-by: Maksim Ivanov <emaxx@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#836512}

TBR=achuith@chromium.org,emaxx@chromium.org,cylai@google.com,chromium-scoped@luci-project-accounts.iam.gserviceaccount.com

Change-Id: Ic6c6749fbc017823bff63732e1dd45c472cd3007
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: b:172748724
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2589058Reviewed-by: Maksim Ivanov <emaxx@chromium.org>
Commit-Queue: Leo Lai <cylai@google.com>
Cr-Commit-Position: refs/heads/master@{#836581}

chrome/browser/chromeos/system_token_cert_db_initializer_unittest.cc

@@ -216,86 +216,6 @@ TEST_F(SystemTokenCertDbInitializerTest,
       get_system_token_cert_db_callback_wrapper.IsDbRetrievalSucceeded());
 }
 
-// Tests that the system token certificate database will be returned
-// successfully by SystemTokenCertDbInitializer if it was available in less than
-// 5 minutes after being requested, and the initialization is triggered by the
-// ownership taken signal from tpm manager.
-TEST_F(SystemTokenCertDbInitializerTest,
-       GetSystemTokenCertDbSuccessOwnershipTakenSignal) {
-  TpmManagerClient::Get()
-      ->GetTestInterface()
-      ->mutable_nonsensitive_status_reply()
-      ->set_is_enabled(true);
-  TpmManagerClient::Get()
-      ->GetTestInterface()
-      ->mutable_nonsensitive_status_reply()
-      ->set_is_owned(false);
-
-  GetSystemTokenCertDbCallbackWrapper get_system_token_cert_db_callback_wrapper;
-  system_token_cert_db_initializer()->GetSystemTokenCertDb(
-      get_system_token_cert_db_callback_wrapper.GetCallback());
-  EXPECT_FALSE(get_system_token_cert_db_callback_wrapper.IsCallbackCalled());
-
-  // Check that after 1 minute, SystemTokenCertDBInitializer is still waiting
-  // for the system token slot to be initialized and the DB retrieval hasn't
-  // timed out yet.
-  const auto kOneMinuteDelay = base::TimeDelta::FromMinutes(1);
-  EXPECT_LT(kOneMinuteDelay,
-            SystemTokenCertDBInitializer::kMaxCertDbRetrievalDelay);
-
-  task_environment()->FastForwardBy(kOneMinuteDelay);
-  EXPECT_FALSE(get_system_token_cert_db_callback_wrapper.IsCallbackCalled());
-
-  EXPECT_TRUE(InitializeTestSystemSlot());
-
-  TpmManagerClient::Get()->GetTestInterface()->EmitOwnershipTakenSignal();
-
-  get_system_token_cert_db_callback_wrapper.Wait();
-
-  EXPECT_TRUE(get_system_token_cert_db_callback_wrapper.IsCallbackCalled());
-  EXPECT_TRUE(
-      get_system_token_cert_db_callback_wrapper.IsDbRetrievalSucceeded());
-}
-
-// Tests that the system token certificate database will be returned
-// successfully by SystemTokenCertDbInitializer if it was available in less than
-// 5 minutes after being requested, and the initialization is triggered by
-// taking TPM ownership and being signaled by tpm manager.
-TEST_F(SystemTokenCertDbInitializerTest,
-       GetSystemTokenCertDbFailureNoOwnershipTakenSignal) {
-  TpmManagerClient::Get()
-      ->GetTestInterface()
-      ->mutable_nonsensitive_status_reply()
-      ->set_is_enabled(true);
-  TpmManagerClient::Get()
-      ->GetTestInterface()
-      ->mutable_nonsensitive_status_reply()
-      ->set_is_owned(false);
-
-  GetSystemTokenCertDbCallbackWrapper get_system_token_cert_db_callback_wrapper;
-  system_token_cert_db_initializer()->GetSystemTokenCertDb(
-      get_system_token_cert_db_callback_wrapper.GetCallback());
-  EXPECT_FALSE(get_system_token_cert_db_callback_wrapper.IsCallbackCalled());
-
-  // Check that after 1 minute, SystemTokenCertDBInitializer is still waiting
-  // for the system token slot to be initialized and the DB retrieval hasn't
-  // timed out yet.
-  const auto kOneMinuteDelay = base::TimeDelta::FromMinutes(1);
-  EXPECT_LT(kOneMinuteDelay,
-            SystemTokenCertDBInitializer::kMaxCertDbRetrievalDelay);
-
-  task_environment()->FastForwardBy(kOneMinuteDelay);
-  EXPECT_FALSE(get_system_token_cert_db_callback_wrapper.IsCallbackCalled());
-
-  EXPECT_TRUE(InitializeTestSystemSlot());
-
-  get_system_token_cert_db_callback_wrapper.Wait();
-
-  EXPECT_TRUE(get_system_token_cert_db_callback_wrapper.IsCallbackCalled());
-  EXPECT_FALSE(
-      get_system_token_cert_db_callback_wrapper.IsDbRetrievalSucceeded());
-}
-
 // Tests that the system token certificate database will be returned
 // successfully by SystemTokenCertDbInitializer if it was available in less than
 // 5 minutes after being requested even if the slot was available after more