- Disassociate old page size from new allocatable size.

runtime/vm/heap.h

Index: runtime/vm/heap.h
===================================================================
--- runtime/vm/heap.h	(revision 22017)
+++ runtime/vm/heap.h	(working copy)
@@ -58,7 +58,7 @@
     switch (space) {
       case kNew:
         // Do not attempt to allocate very large objects in new space.
-        if (!PageSpace::IsPageAllocatableSize(size)) {
+        if (!IsAllocatableInNewSpace(size)) {
           return AllocateOld(size, HeapPage::kData);
         }
         return AllocateNew(size);
@@ -192,6 +192,10 @@
 
   bool gc_in_progress() const { return gc_in_progress_; }
 
+  static bool IsAllocatableInNewSpace(intptr_t size) {
+    return size <= kNewAllocatableSize;
+  }
+
  private:
   class GCStats : public ValueObject {
    public:
@@ -224,6 +228,8 @@
     DISALLOW_COPY_AND_ASSIGN(GCStats);
   };
 
+  static const intptr_t kNewAllocatableSize = 256 * KB;
+
   Heap();
 
   uword AllocateNew(intptr_t size);