Restrict CM API interface request and message dispatch.

components/password_manager/content/browser/credential_manager_impl.h

Index: components/password_manager/content/browser/credential_manager_impl.h
diff --git a/components/password_manager/content/browser/credential_manager_impl.h b/components/password_manager/content/browser/credential_manager_impl.h
index 6db0b992f106151e058e8106c7c3c1cd073f78a0..f7d85ae4806b7557d7cce1d7747bb9d138040ca1 100644
--- a/components/password_manager/content/browser/credential_manager_impl.h
+++ b/components/password_manager/content/browser/credential_manager_impl.h
@@ -18,7 +18,7 @@
 #include "components/password_manager/core/common/credential_manager_types.h"
 #include "components/prefs/pref_member.h"
 #include "content/public/browser/web_contents_observer.h"
-#include "mojo/public/cpp/bindings/binding_set.h"
+#include "mojo/public/cpp/bindings/binding.h"
 
 class GURL;
 
@@ -49,6 +49,7 @@ class CredentialManagerImpl
   ~CredentialManagerImpl() override;
 
   void BindRequest(mojom::CredentialManagerRequest request);
+  void DisconnectBinding();
 
   // mojom::CredentialManager methods:
   void Store(const CredentialInfo& credential, StoreCallback callback) override;
@@ -97,7 +98,7 @@ class CredentialManagerImpl
   std::unique_ptr<CredentialManagerPendingPreventSilentAccessTask>
       pending_require_user_mediation_;
 
-  mojo::BindingSet<mojom::CredentialManager> bindings_;
+  mojo::Binding<mojom::CredentialManager> binding_;
 
   base::WeakPtrFactory<CredentialManagerImpl> weak_factory_;