[Password Manager] Replace "this site" in save password prompt with password's origin.

components/password_manager/core/browser/password_form_manager.h

Index: components/password_manager/core/browser/password_form_manager.h
diff --git a/components/password_manager/core/browser/password_form_manager.h b/components/password_manager/core/browser/password_form_manager.h
index 70eeccf9aea470cf1ddf94d31e96d6e65cc4b808..1969e5d4a116c8e9248198f87dfcde77d96ff1d7 100644
--- a/components/password_manager/core/browser/password_form_manager.h
+++ b/components/password_manager/core/browser/password_form_manager.h
@@ -205,6 +205,8 @@ class PasswordFormManager : public PasswordStoreConsumer {
 
   const autofill::PasswordForm& observed_form() const { return observed_form_; }
 
+  PasswordManagerClient* client() { return client_; }
+
  private:
   friend class PasswordFormManagerTest;