Limit size of first page based on serialized data.

src/heap/spaces.cc

Index: src/heap/spaces.cc
diff --git a/src/heap/spaces.cc b/src/heap/spaces.cc
index 1219a7a74dbc58a3305168aaf69198b4b64665dc..c2ce5fcfafb28f830805e01d3b9fc3d5617c9daa 100644
--- a/src/heap/spaces.cc
+++ b/src/heap/spaces.cc
@@ -1038,6 +1038,10 @@ bool PagedSpace::Expand() {
 
   intptr_t size = AreaSize();
 
+  if (anchor_.next_page() == &anchor_) {
+    size = Snapshot::SizeOfFirstPage(identity());
+  }
+
   Page* p = heap()->isolate()->memory_allocator()->AllocatePage(size, this,
                                                                 executable());
   if (p == NULL) return false;