Bug 708901 - Migrate to nsTHashSet in xpcom. r=xpcom-reviewers,kmag

Depends on D109326

Differential Revision: https://phabricator.services.mozilla.com/D109327

xpcom/base/CycleCollectedJSRuntime.cpp

@@ -1816,8 +1816,8 @@ void CycleCollectedJSRuntime::PrepareWaitingZonesForGC() {
   if (mZonesWaitingForGC.Count() == 0) {
     JS::PrepareForFullGC(cx);
   } else {
-    for (auto iter = mZonesWaitingForGC.Iter(); !iter.Done(); iter.Next()) {
-      JS::PrepareZoneForGC(cx, iter.Get()->GetKey());
+    for (const auto& key : mZonesWaitingForGC) {
+      JS::PrepareZoneForGC(cx, key);
     }
     mZonesWaitingForGC.Clear();
   }
@@ -1829,7 +1829,7 @@ void CycleCollectedJSRuntime::OnZoneDestroyed(JSFreeOp* aFop, JS::Zone* aZone) {
   // happen if a zone is added to the set during an incremental GC in which it
   // is later destroyed.
   CycleCollectedJSRuntime* runtime = Get();
-  runtime->mZonesWaitingForGC.RemoveEntry(aZone);
+  runtime->mZonesWaitingForGC.Remove(aZone);
 }
 
 void CycleCollectedJSRuntime::EnvironmentPreparer::invoke(

xpcom/base/CycleCollectedJSRuntime.h

@@ -22,7 +22,7 @@
 #include "nsTHashMap.h"
 #include "nsHashKeys.h"
 #include "nsStringFwd.h"
-#include "nsTHashtable.h"
+#include "nsTHashSet.h"
 
 class nsCycleCollectionNoteRootCallback;
 class nsIException;
@@ -333,7 +333,7 @@ class CycleCollectedJSRuntime {
 
   // Add aZone to the set of zones waiting for a GC.
   void AddZoneWaitingForGC(JS::Zone* aZone) {
-    mZonesWaitingForGC.PutEntry(aZone);
+    mZonesWaitingForGC.Insert(aZone);
   }
 
   static void OnZoneDestroyed(JSFreeOp* aFop, JS::Zone* aZone);
@@ -389,7 +389,7 @@ class CycleCollectedJSRuntime {
                   InfallibleAllocPolicy>
       mPreservedNurseryObjects;
 
-  nsTHashtable<nsPtrHashKey<JS::Zone>> mZonesWaitingForGC;
+  nsTHashSet<JS::Zone*> mZonesWaitingForGC;
 
   struct EnvironmentPreparer : public js::ScriptEnvironmentPreparer {
     void invoke(JS::HandleObject global, Closure& closure) override;