limit InitialMaxFastElement by MaxRegularSpaceAllocationSize

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index f159b662ca613f35283e00b07e7eea9226ebabcf..bd03db7be8d8d5959e52ccf9ea33a9818de98fc0 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -2684,10 +2684,7 @@ class JSObject: public JSReceiver {
   // don't want to be wasteful with long lived objects.
   static const int kMaxUncheckedOldFastElementsLength = 500;
 
-  // TODO(2790): HAllocate currently always allocates fast backing stores
-  // in new space, where on x64 we can only fit ~98K elements. Keep this
-  // limit lower than that until HAllocate is made smarter.
-  static const int kInitialMaxFastElementArray = 95000;
+  static const int kInitialMaxFastElementArray = 100000;
 
   static const int kFastPropertiesSoftLimit = 12;
   static const int kMaxFastProperties = 64;
@@ -2717,6 +2714,7 @@ class JSObject: public JSReceiver {
 
   // Deliver change records to observers. May cause GC.
   static void DeliverChangeRecords(Isolate* isolate);
+  static int InitialMaxFastElementArray(Heap* heap);
 
  private:
   friend class DictionaryElementsAccessor;