In precompilation, finalize all classes eagerly. Use the stable class hierarchy for doing CHA based…

runtime/vm/snapshot.cc

Index: runtime/vm/snapshot.cc
diff --git a/runtime/vm/snapshot.cc b/runtime/vm/snapshot.cc
index d496aaa9321572362fc79ebd2962e4256b072b70..38a61ba7be82a75c5a62f1490448a300657f4bdb 100644
--- a/runtime/vm/snapshot.cc
+++ b/runtime/vm/snapshot.cc
@@ -1117,6 +1117,11 @@ RawGrowableObjectArray* SnapshotReader::NewGrowableObjectArray() {
 }
 
 
+RawWeakProperty* SnapshotReader::NewWeakProperty() {
+  ALLOC_NEW_OBJECT(WeakProperty);
+}
+
+
 RawFloat32x4* SnapshotReader::NewFloat32x4(float v0, float v1, float v2,
                                            float v3) {
   ASSERT(kind_ == Snapshot::kFull);