for #33101 - sync up nsIMsgSearchSession and nsIMsgFilter APIs so that I can share the same JS to add/create terms

r=sspitzer

mailnews/base/search/public/nsIMsgSearchSession.idl

@@ -47,7 +47,8 @@ interface nsIMsgSearchSession :  nsISupports {
 
 	void AddSearchTermArray (in nsISupportsArray searchTerms);
 
-	void CreateSearchTerm (out nsIMsgSearchTerm searchTerm);
+	nsIMsgSearchTerm createTerm ();
+    void appendTerm(in nsIMsgSearchTerm term);
 
 	void RegisterListener (in nsIMsgSearchNotify listener);
 	void UnregisterListener (in nsIMsgSearchNotify listener);

mailnews/base/search/src/nsMsgSearchSession.cpp

@@ -72,6 +72,14 @@ nsMsgSearchSession::AddSearchTerm(nsMsgSearchAttribValue attrib,
 	return NS_OK;
 }
 
+NS_IMETHODIMP
+nsMsgSearchSession::AppendTerm(nsIMsgSearchTerm *aTerm)
+{
+    NS_ENSURE_ARG_POINTER(aTerm);
+    NS_ENSURE_TRUE(m_termList, NS_ERROR_NOT_INITIALIZED);
+    return m_termList->AppendElement(aTerm);
+}
+
 NS_IMETHODIMP
 nsMsgSearchSession::AddSearchTermArray(nsISupportsArray *searchTerms)
 {
@@ -80,7 +88,7 @@ nsMsgSearchSession::AddSearchTermArray(nsISupportsArray *searchTerms)
 }
 
 NS_IMETHODIMP
-nsMsgSearchSession::CreateSearchTerm(nsIMsgSearchTerm **aResult)
+nsMsgSearchSession::CreateTerm(nsIMsgSearchTerm **aResult)
 {
     nsMsgSearchTerm *term = new nsMsgSearchTerm;
     NS_ENSURE_TRUE(term, NS_ERROR_OUT_OF_MEMORY);