Restrict CM API interface request and message dispatch.

components/password_manager/content/browser/credential_manager_impl.cc

Index: components/password_manager/content/browser/credential_manager_impl.cc
diff --git a/components/password_manager/content/browser/credential_manager_impl.cc b/components/password_manager/content/browser/credential_manager_impl.cc
index d78025d7226635b14e1f21be113fe5a3d3360591..0d3d559f1b5120b1ed97e66bb7235c5933097f43 100644
--- a/components/password_manager/content/browser/credential_manager_impl.cc
+++ b/components/password_manager/content/browser/credential_manager_impl.cc
@@ -40,7 +40,10 @@ void RunMojoGetCallback(mojom::CredentialManager::GetCallback callback,
 
 CredentialManagerImpl::CredentialManagerImpl(content::WebContents* web_contents,
                                              PasswordManagerClient* client)
-    : WebContentsObserver(web_contents), client_(client), weak_factory_(this) {
+    : WebContentsObserver(web_contents),
+      client_(client),
+      binding_(this),
+      weak_factory_(this) {
   DCHECK(web_contents);
   auto_signin_enabled_.Init(prefs::kCredentialsEnableAutosignin,
                             client_->GetPrefs());
@@ -50,7 +53,12 @@ CredentialManagerImpl::~CredentialManagerImpl() {}
 
 void CredentialManagerImpl::BindRequest(
     mojom::CredentialManagerRequest request) {
-  bindings_.AddBinding(this, std::move(request));
+  DCHECK(!binding_.is_bound());
+  binding_.Bind(std::move(request));
+}
+
+void CredentialManagerImpl::DisconnectBinding() {
+  binding_.Close();
 }
 
 void CredentialManagerImpl::Store(const CredentialInfo& credential,