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

components/password_manager/core/browser/password_manager_driver.h

Index: components/password_manager/core/browser/password_manager_driver.h
diff --git a/components/password_manager/core/browser/password_manager_driver.h b/components/password_manager/core/browser/password_manager_driver.h
index 08d4323d90270860661d60da944b7040a766c28a..23da911006f2f961afa23aaaf09f0d4ad58db0a6 100644
--- a/components/password_manager/core/browser/password_manager_driver.h
+++ b/components/password_manager/core/browser/password_manager_driver.h
@@ -66,6 +66,10 @@ class PasswordManagerDriver
   // Tells the driver to clear previewed password and username fields.
   virtual void ClearPreviewedForm() = 0;
 
+  // Tells the driver to find the focused password field and report back
+  // the corresponding password form, so that it can be saved.
+  virtual void ForceSavePassword() = 0;
+
   // Returns the PasswordGenerationManager associated with this instance.
   virtual PasswordGenerationManager* GetPasswordGenerationManager() = 0;