Disable the autofill password manager when a credential is sent via CM API.

components/password_manager/core/browser/password_manager_unittest.cc

Index: components/password_manager/core/browser/password_manager_unittest.cc
diff --git a/components/password_manager/core/browser/password_manager_unittest.cc b/components/password_manager/core/browser/password_manager_unittest.cc
index 8cb257c6659c19c298fe301e46b1c88a6444c35e..9fffb1799889b4c9a625f3453c77ebbfb169e5b0 100644
--- a/components/password_manager/core/browser/password_manager_unittest.cc
+++ b/components/password_manager/core/browser/password_manager_unittest.cc
@@ -1339,6 +1339,27 @@ TEST_F(PasswordManagerTest, UpdateFormManagers) {
   manager()->UpdateFormManagers();
 }
 
+TEST_F(PasswordManagerTest, DropFormManagers) {
+  // Interrupt the normal submit flow by DropFormManagers().
+  std::vector<PasswordForm> observed;
+  PasswordForm form(MakeSimpleForm());
+  observed.push_back(form);
+  EXPECT_CALL(*store_, GetLogins(_, _))
+      .WillRepeatedly(WithArg<1>(InvokeEmptyConsumerWithForms()));
+  manager()->OnPasswordFormsParsed(&driver_, observed);
+  manager()->OnPasswordFormsRendered(&driver_, observed, true);
+
+  manager()->DropFormManagers();
+  EXPECT_CALL(client_, IsSavingAndFillingEnabledForCurrentPage())
+      .WillRepeatedly(Return(true));
+  OnPasswordFormSubmitted(form);
+
+  EXPECT_CALL(client_, PromptUserToSaveOrUpdatePasswordPtr(_, _)).Times(0);
+  observed.clear();
+  manager()->OnPasswordFormsParsed(&driver_, observed);
+  manager()->OnPasswordFormsRendered(&driver_, observed, true);
+}
+
 TEST_F(PasswordManagerTest, AutofillingOfAffiliatedCredentials) {
   PasswordForm android_form(MakeAndroidCredential());
   PasswordForm observed_form(MakeSimpleForm());