[heap] Switch to 500k pages

src/heap/spaces.h

Index: src/heap/spaces.h
diff --git a/src/heap/spaces.h b/src/heap/spaces.h
index c035342bfa85058dd9be34024e17cbc6d5722be3..226d300f853a961cf940a92d8516dc142f571394 100644
--- a/src/heap/spaces.h
+++ b/src/heap/spaces.h
@@ -689,7 +689,7 @@ class Page : public MemoryChunk {
   // account.
   // TODO(hpayer): This limit should be way smaller but we currently have
   // short living objects >256K.
-  static const int kMaxRegularHeapObjectSize = 600 * KB;
+  static const int kMaxRegularHeapObjectSize = 300 * KB;
 
   static inline Page* ConvertNewToOld(Page* old_page, PagedSpace* new_owner);
 
@@ -2156,6 +2156,8 @@ class PagedSpace : public Space {
   // size limit has been hit.
   bool Expand();
 
+  int AreaSizeDuringDeserialization();
+
   // Generic fast case allocation function that tries linear allocation at the
   // address denoted by top in allocation_info_.
   inline HeapObject* AllocateLinearly(int size_in_bytes);