Bug 1733308 - Fix non-unified builds errors in xpcom/ds. r=xpcom-reviewers,mccr8

xpcom/ds/nsProperties.cpp:56:3: error: use of undeclared identifier 'AppendToArray'; did you mean 'mozilla::AppendToArray'?
xpcom/ds/PLDHashTable.cpp:324:3: error: use of undeclared identifier 'NS_ASSERTION'
xpcom/ds/PLDHashTable.cpp:395:3: error: use of undeclared identifier 'NS_ASSERTION'
xpcom/ds/PLDHashTable.cpp:679:7: error: use of undeclared identifier 'NS_ABORT_OOM'
xpcom/ds/PLDHashTable.cpp:685:7: error: use of undeclared identifier 'NS_ABORT_OOM'

Differential Revision: https://phabricator.services.mozilla.com/D127039

xpcom/ds/PLDHashTable.cpp

@@ -9,6 +9,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include "PLDHashTable.h"
+#include "nsDebug.h"
 #include "mozilla/HashFunctions.h"
 #include "mozilla/MathAlgorithms.h"
 #include "mozilla/OperatorNewExtensions.h"

xpcom/ds/moz.build

@@ -154,5 +154,3 @@ FINAL_LIBRARY = "xul"
 PYTHON_UNITTEST_MANIFESTS += [
     "test/python.ini",
 ]
-
-REQUIRES_UNIFIED_BUILD = True

xpcom/ds/nsProperties.cpp

@@ -53,7 +53,7 @@ nsProperties::Has(const char* prop, bool* result) {
 
 NS_IMETHODIMP
 nsProperties::GetKeys(nsTArray<nsCString>& aKeys) {
-  AppendToArray(aKeys, this->Keys());
+  mozilla::AppendToArray(aKeys, this->Keys());
 
   return NS_OK;
 }