Make sure challenging user keys doesn't work in signin profile.

chrome/browser/extensions/api/enterprise_platform_keys_private/enterprise_platform_keys_private_api_unittest.cc

Index: chrome/browser/extensions/api/enterprise_platform_keys_private/enterprise_platform_keys_private_api_unittest.cc
diff --git a/chrome/browser/extensions/api/enterprise_platform_keys_private/enterprise_platform_keys_private_api_unittest.cc b/chrome/browser/extensions/api/enterprise_platform_keys_private/enterprise_platform_keys_private_api_unittest.cc
index 01494f642ad35d1a5f59f2671f6c08f45be21589..c487110b815343ebaa1f936fcdb936aee5739932 100644
--- a/chrome/browser/extensions/api/enterprise_platform_keys_private/enterprise_platform_keys_private_api_unittest.cc
+++ b/chrome/browser/extensions/api/enterprise_platform_keys_private/enterprise_platform_keys_private_api_unittest.cc
@@ -409,8 +409,9 @@ class EPKPChallengeUserKeyTest : public EPKPChallengeKeyTestBase {
  protected:
   static const char kArgs[];
 
-  EPKPChallengeUserKeyTest()
-      : EPKPChallengeKeyTestBase(ProfileType::USER_PROFILE),
+  explicit EPKPChallengeUserKeyTest(
+      ProfileType profile_type = ProfileType::USER_PROFILE)
+      : EPKPChallengeKeyTestBase(profile_type),
         impl_(&mock_cryptohome_client_,
               &mock_async_method_caller_,
               &mock_attestation_flow_,
@@ -423,8 +424,10 @@ class EPKPChallengeUserKeyTest : public EPKPChallengeKeyTestBase {
   void SetUp() override {
     EPKPChallengeKeyTestBase::SetUp();
 
-    // Set the user preferences.
-    prefs_->SetBoolean(prefs::kAttestationEnabled, true);
+    if (profile_type_ == ProfileType::USER_PROFILE) {
+      // Set the user preferences.
+      prefs_->SetBoolean(prefs::kAttestationEnabled, true);
+    }
   }
 
   // Returns an error string for the given code.
@@ -578,6 +581,19 @@ TEST_F(EPKPChallengeUserKeyTest, AttestationPreparedDbusFailed) {
             utils::RunFunctionAndReturnError(func_.get(), kArgs, browser()));
 }
 
+class EPKPChallengeUserKeySigninProfileTest : public EPKPChallengeUserKeyTest {
+ protected:
+  EPKPChallengeUserKeySigninProfileTest()
+      : EPKPChallengeUserKeyTest(ProfileType::SIGNIN_PROFILE) {}
+};
+
+TEST_F(EPKPChallengeUserKeySigninProfileTest, UserKeyNotAvailable) {
+  settings_helper_.SetBoolean(chromeos::kDeviceAttestationEnabled, false);
+
+  EXPECT_EQ(EPKPChallengeUserKey::kUserKeyNotAvailable,
+            utils::RunFunctionAndReturnError(func_.get(), kArgs, browser()));
+}
+
 class EPKPChallengeMachineKeyUnmanagedUserTest
     : public EPKPChallengeMachineKeyTest {
  protected: