Last snapshot bits to get working precompiled hello_world on x64.

runtime/vm/megamorphic_cache_table.h

Index: runtime/vm/megamorphic_cache_table.h
diff --git a/runtime/vm/megamorphic_cache_table.h b/runtime/vm/megamorphic_cache_table.h
index eafb35b12b6ed45d8f656c62668d1518adad1f10..2297dc9821247e8dabe8aa1814830ec4f51a2628 100644
--- a/runtime/vm/megamorphic_cache_table.h
+++ b/runtime/vm/megamorphic_cache_table.h
@@ -18,6 +18,8 @@ class RawCode;
 class RawMegamorphicCache;
 class RawString;
 class String;
+class SnapshotReader;
+class SnapshotWriter;
 
 class MegamorphicCacheTable {
  public:
@@ -33,6 +35,9 @@ class MegamorphicCacheTable {
 
   void PrintSizes();
 
+  void ReadFrom(SnapshotReader* reader);
+  void WriteTo(SnapshotWriter* writer);

[siva, 2015/09/14 21:29:34]

This change seems to be in the other CL too.

[rmacnak, 2015/09/15 20:07:45]

Dropped.

+
  private:
   struct Entry {
     RawString* name;