JS: Remove allocation site restriction in CG

Author: asgerf

javascript/ql/lib/semmle/javascript/dataflow/internal/CallGraphs.qll

@@ -241,13 +241,8 @@ module CallGraph {
     )
   }
 
-  private DataFlow::FunctionNode getAMethodOnPlainObject(DataFlow::SourceNode node) {
+  private DataFlow::FunctionNode getAMethodOnObject(DataFlow::SourceNode node) {
     (
-      (
-        node instanceof DataFlow::ObjectLiteralNode
-        or
-        node instanceof DataFlow::FunctionNode
-      ) and
       result = node.getAPropertySource()
       or
       result = node.(DataFlow::ObjectLiteralNode).getPropertyGetter(_)
@@ -258,7 +253,7 @@ module CallGraph {
   }
 
   private predicate shouldTrackObjectWithMethods(DataFlow::SourceNode node) {
-    exists(getAMethodOnPlainObject(node))
+    exists(getAMethodOnObject(node))
   }
 
   /**
@@ -292,7 +287,7 @@ module CallGraph {
   predicate impliedReceiverStep(DataFlow::SourceNode pred, DataFlow::SourceNode succ) {
     exists(DataFlow::SourceNode host |
       pred = getAnAllocationSiteRef(host) and
-      succ = getAMethodOnPlainObject(host).getReceiver()
+      succ = getAMethodOnObject(host).getReceiver()
     )
   }
 }