- Promote objects from new gen to old space if they survived a scavenge.

vm/heap.h

Index: vm/heap.h
===================================================================
--- vm/heap.h	(revision 2792)
+++ vm/heap.h	(working copy)
@@ -6,17 +6,17 @@
 #define VM_HEAP_H_
 
 #include "vm/allocation.h"
+#include "vm/assert.h"
 #include "vm/flags.h"
 #include "vm/globals.h"
 #include "vm/pages.h"
+#include "vm/scavenger.h"
 
 namespace dart {
 
 // Forward declarations.
 class Isolate;
 class ObjectPointerVisitor;
-class PageSpace;
-class Scavenger;
 class VirtualMemory;
 
 DECLARE_FLAG(bool, verbose_gc);
@@ -56,6 +56,19 @@
     return 0;
   }
 
+  uword TryAllocate(intptr_t size, Space space) {
+    switch (space) {
+      case kNew:
+        return new_space_->TryAllocate(size);
+      case kOld:
+        return old_space_->TryAllocate(size);
+      case kExecutable:
+        return code_space_->TryAllocate(size);
+      default:
+        UNREACHABLE();
+    }
+  }
+
   // Heap contains the specified address.
   bool Contains(uword addr) const;
   bool CodeContains(uword addr) const;