Mojo bindings: merge the control messages of sending disconnect reason and notifying endpoint close…

mojo/public/interfaces/bindings/interface_control_messages.mojom

Index: mojo/public/interfaces/bindings/interface_control_messages.mojom
diff --git a/mojo/public/interfaces/bindings/interface_control_messages.mojom b/mojo/public/interfaces/bindings/interface_control_messages.mojom
index 39d7bde9b0b86ed28cac246d8e999e6d64b0ea02..0a1904206a5610bf58a8a1ecec1a57278cb1732f 100644
--- a/mojo/public/interfaces/bindings/interface_control_messages.mojom
+++ b/mojo/public/interfaces/bindings/interface_control_messages.mojom
@@ -57,7 +57,6 @@ struct RunOrClosePipeMessageParams {
 };
 union RunOrClosePipeInput {
   RequireVersion require_version;
-  SendDisconnectReason send_disconnect_reason;
 };
 
 // If the specified version of the user-defined interface is not supported, the
@@ -66,11 +65,3 @@ union RunOrClosePipeInput {
 struct RequireVersion {
   uint32 version;
 };
-
-// A user-defined reason about why the interface is disconnected. The sender
-// usually send this message and immediately disconnect the interface.
-// Sent by either side of the interface.
-struct SendDisconnectReason {
-  uint32 custom_reason;
-  string description;
-};