Mojo C++ bindings: introduce an optional array to store transferred interface IDs in messages.

mojo/public/interfaces/bindings/tests/data/validation/associated_conformance_mthd0_illegal_master_interface_id.data

Index: mojo/public/interfaces/bindings/tests/data/validation/associated_conformance_mthd0_illegal_master_interface_id.data
diff --git a/mojo/public/interfaces/bindings/tests/data/validation/associated_conformance_mthd0_illegal_master_interface_id.data b/mojo/public/interfaces/bindings/tests/data/validation/associated_conformance_mthd0_illegal_master_interface_id.data
new file mode 100644
index 0000000000000000000000000000000000000000..e3fa5bb4f5ef7ef44a7c16660d7d6ee80367aa6d
--- /dev/null
+++ b/mojo/public/interfaces/bindings/tests/data/validation/associated_conformance_mthd0_illegal_master_interface_id.data
@@ -0,0 +1,24 @@
+[dist4]message_header  // num_bytes
+[u4]2                  // version
+[u4]0                  // interface ID
+[u4]0                  // name
+[u4]0                  // flags
+[u4]0                  // padding
+[u8]0                  // request_id
+[dist8]payload
+[dist8]payload_interface_ids
+[anchr]message_header
+
+[anchr]payload
+[dist4]method0_params  // num_bytes
+[u4]0                  // version
+[u4]1                  // associated interface pointer: interface ID index
+[u4]1                  // associated interface pointer: version
+[anchr]method0_params
+
+[anchr]payload_interface_ids
+[dist4]interface_id_array  // num_bytes
+[u4]2                      // num_elements
+[u4]3
+[u4]0                      // Unexpected master interface ID.
+[anchr]interface_id_array