Suppress the autofill password manager after a credential was saved via the API.

chrome/browser/password_manager/password_manager_test_base.h

Index: chrome/browser/password_manager/password_manager_test_base.h
diff --git a/chrome/browser/password_manager/password_manager_test_base.h b/chrome/browser/password_manager/password_manager_test_base.h
index 0ca517950709260d4099a0fcf761a85a32dc82dc..a0f411f83f79f6dff871b64cc5b6affaf0883e4d 100644
--- a/chrome/browser/password_manager/password_manager_test_base.h
+++ b/chrome/browser/password_manager/password_manager_test_base.h
@@ -67,6 +67,10 @@ class PromptObserver {
   // Checks if the update prompt is being currently shown.
   virtual bool IsShowingUpdatePrompt() const;
 
+  // Dismisses the prompt currently open and moves the controller to the
+  // inactive state.
+  virtual void Dismiss() const = 0;
+
   // Expecting that the prompt is shown, saves the password. Checks that the
   // prompt is no longer visible afterwards.
   void Accept() const;