8230562: Remove g1HeapSizingPolicy_ext.cpp

Reviewed-by: dholmes, sjohanss

Author: stefank

src/hotspot/share/gc/g1/g1HeapSizingPolicy.cpp

@@ -31,6 +31,10 @@
 #include "utilities/debug.hpp"
 #include "utilities/globalDefinitions.hpp"
 
+G1HeapSizingPolicy* G1HeapSizingPolicy::create(const G1CollectedHeap* g1h, const G1Analytics* analytics) {
+  return new G1HeapSizingPolicy(g1h, analytics);
+}
+
 G1HeapSizingPolicy::G1HeapSizingPolicy(const G1CollectedHeap* g1h, const G1Analytics* analytics) :
   _g1h(g1h),
   _analytics(analytics),