Compress deopt instructions in memory using variable length encoding.

runtime/vm/raw_object_snapshot.cc

Index: runtime/vm/raw_object_snapshot.cc
diff --git a/runtime/vm/raw_object_snapshot.cc b/runtime/vm/raw_object_snapshot.cc
index 6a9c4904485c69d88e73820dce58bd05a2cc0c15..acc396b9431843dd892bf66c950a0aeff09bf94e 100644
--- a/runtime/vm/raw_object_snapshot.cc
+++ b/runtime/vm/raw_object_snapshot.cc
@@ -1342,22 +1342,6 @@ void RawExceptionHandlers::WriteTo(SnapshotWriter* writer,
 }
 
 
-RawDeoptInfo* DeoptInfo::ReadFrom(SnapshotReader* reader,
-                                  intptr_t object_id,
-                                  intptr_t tags,
-                                  Snapshot::Kind kind) {
-  UNREACHABLE();
-  return DeoptInfo::null();
-}
-
-
-void RawDeoptInfo::WriteTo(SnapshotWriter* writer,
-                           intptr_t object_id,
-                           Snapshot::Kind kind) {
-  UNREACHABLE();
-}
-
-
 RawContext* Context::ReadFrom(SnapshotReader* reader,
                               intptr_t object_id,
                               intptr_t tags,