Remove a NOTREACHED() in FormValueNode_SetChildContent().

It is reachable, and the action is currently a no-op, so let it be. Also
change FormValueNode_SetChildContent() to return void since no caller
checks the return value. Remove its default argument, since all the
callers set it.

Change-Id: I742ca2d936872a3b3d609c178321199abc06546c
Reviewed-on: https://pdfium-review.googlesource.com/39115
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: Ryan Harrison <rharrison@chromium.org>
diff --git a/xfa/fxfa/parser/cxfa_document.cpp b/xfa/fxfa/parser/cxfa_document.cpp
index 3b086fa..4d51c0b 100644
--- a/xfa/fxfa/parser/cxfa_document.cpp
+++ b/xfa/fxfa/parser/cxfa_document.cpp
@@ -86,16 +86,16 @@
   return pChildNode;
 }
 
-bool FormValueNode_SetChildContent(CXFA_Node* pValueNode,
+void FormValueNode_SetChildContent(CXFA_Node* pValueNode,
                                    const WideString& wsContent,
-                                   XFA_Element iType = XFA_Element::Unknown) {
+                                   XFA_Element iType) {
   if (!pValueNode)
-    return false;
+    return;
 
   ASSERT(pValueNode->GetPacketType() == XFA_PacketType::Form);
   CXFA_Node* pChildNode = FormValueNode_CreateChild(pValueNode, iType);
   if (!pChildNode)
-    return false;
+    return;
 
   switch (pChildNode->GetObjectType()) {
     case XFA_ObjectType::ContentNode: {
@@ -128,10 +128,8 @@
       break;
     }
     default:
-      NOTREACHED();
       break;
   }
-  return true;
 }
 
 void MergeNodeRecurse(CXFA_Node* pDestNodeParent, CXFA_Node* pProtoNode) {