Stop prerendering of a site if it uses the Credential Manager API.

components/password_manager/content/browser/credential_manager_impl_unittest.cc

Index: components/password_manager/content/browser/credential_manager_impl_unittest.cc
diff --git a/components/password_manager/content/browser/credential_manager_impl_unittest.cc b/components/password_manager/content/browser/credential_manager_impl_unittest.cc
index b9c6ef38f16e39c029f8a53a20243c6851e4512b..a3b064cd34cd5e0b9db83ef0d00972561a1d4ace 100644
--- a/components/password_manager/content/browser/credential_manager_impl_unittest.cc
+++ b/components/password_manager/content/browser/credential_manager_impl_unittest.cc
@@ -56,6 +56,7 @@ class MockPasswordManagerClient : public StubPasswordManagerClient {
  public:
   MOCK_CONST_METHOD0(IsSavingAndFillingEnabledForCurrentPage, bool());
   MOCK_CONST_METHOD0(IsFillingEnabledForCurrentPage, bool());
+  MOCK_METHOD0(OnCredentialManagerUsed, bool());
   MOCK_CONST_METHOD0(IsOffTheRecord, bool());
   MOCK_METHOD0(NotifyUserAutoSigninPtr, bool());
   MOCK_METHOD1(NotifyUserCouldBeAutoSignedInPtr,
@@ -215,6 +216,8 @@ class CredentialManagerImplTest : public content::RenderViewHostTestHarness {
         .WillByDefault(testing::Return(true));
     ON_CALL(*client_, IsFillingEnabledForCurrentPage())
         .WillByDefault(testing::Return(true));
+    ON_CALL(*client_, OnCredentialManagerUsed())
+        .WillByDefault(testing::Return(true));
     ON_CALL(*client_, IsOffTheRecord()).WillByDefault(testing::Return(false));
 
     NavigateAndCommit(GURL("https://example.com/test.html"));
@@ -1037,6 +1040,18 @@ TEST_F(CredentialManagerImplTest, RequestCredentialWithTLSErrors) {
   ExpectZeroClickSignInFailure(true, true, federations);
 }
 
+TEST_F(CredentialManagerImplTest, RequestCredentialWhilePrerendering) {
+  // The client disallows the credential manager for the current page.
+  EXPECT_CALL(*client_, OnCredentialManagerUsed())
+      .WillRepeatedly(testing::Return(false));
+
+  store_->AddLogin(form_);
+
+  std::vector<GURL> federations;
+
+  ExpectZeroClickSignInFailure(true, true, federations);
+}
+
 TEST_F(CredentialManagerImplTest,
        CredentialManagerOnRequestCredentialWithZeroClickOnlyTwoPasswordStore) {
   store_->AddLogin(form_);