Add a basic functionality to the force-saving menu item.

components/password_manager/core/browser/password_manager_client.h

Index: components/password_manager/core/browser/password_manager_client.h
diff --git a/components/password_manager/core/browser/password_manager_client.h b/components/password_manager/core/browser/password_manager_client.h
index 0309454f0909aed10ed50891123618e9e56bbe1b..5213a5d9199bdd6fca131a6889362e610334eec0 100644
--- a/components/password_manager/core/browser/password_manager_client.h
+++ b/components/password_manager/core/browser/password_manager_client.h
@@ -94,6 +94,10 @@ class PasswordManagerClient {
       const GURL& origin,
       base::Callback<void(const CredentialInfo&)> callback) = 0;
 
+  // Informs the embedder that the user has manually requested to save the
+  // password in the focused password field.
+  virtual void ForceSavePassword() = 0;
+
   // Informs the embedder that automatic signing in just happened. The form
   // returned to the site is |local_forms[0]|. |local_forms| and
   // |federated_forms| contain all the local and federated credentials for the