Add a new BindInterface() method to Connector.

ash/mus/accessibility_delegate_mus.cc

Index: ash/mus/accessibility_delegate_mus.cc
diff --git a/ash/mus/accessibility_delegate_mus.cc b/ash/mus/accessibility_delegate_mus.cc
index 08e7ece102ed3ac346aba6b5453620b9f4718e6d..186d804212ebe4eb02b9569b19193ac9d33707f0 100644
--- a/ash/mus/accessibility_delegate_mus.cc
+++ b/ash/mus/accessibility_delegate_mus.cc
@@ -17,10 +17,9 @@ AccessibilityDelegateMus::~AccessibilityDelegateMus() {}
 
 ui::mojom::AccessibilityManager*
 AccessibilityDelegateMus::GetAccessibilityManager() {
-  if (!accessibility_manager_ptr_.is_bound()) {
-    connector_->ConnectToInterface(ui::mojom::kServiceName,
-                                   &accessibility_manager_ptr_);
-  }
+  if (!accessibility_manager_ptr_.is_bound())
+    connector_->BindInterface(ui::mojom::kServiceName,
+                              &accessibility_manager_ptr_);
   return accessibility_manager_ptr_.get();
 }