Be more willing to expand old space when evacuating new space at the end of

src/spaces.h

Index: src/spaces.h
===================================================================
--- src/spaces.h	(revision 10084)
+++ src/spaces.h	(working copy)
@@ -1620,6 +1620,11 @@
 
   bool CanExpand();
 
+  // Expands the space by allocating a fixed number of pages. Returns false if
+  // it cannot allocate requested number of pages from OS, or if the hard heap
+  // size limit has been hit.
+  bool Expand();
+
   // Returns the number of total pages in this space.
   int CountTotalPages();
 
@@ -1649,10 +1654,6 @@
 
   Page* first_unswept_page_;
 
-  // Expands the space by allocating a fixed number of pages. Returns false if
-  // it cannot allocate requested number of pages from OS.
-  bool Expand();
-
   // 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);