Revert of Encode reservation meta data in the snapshot blob.

src/snapshot-common.cc

Index: src/snapshot-common.cc
diff --git a/src/snapshot-common.cc b/src/snapshot-common.cc
index f06f38a19983665b1f233251a3a0692169601688..b152ad354b660f16b82bb4c8edee84eaf0342237 100644
--- a/src/snapshot-common.cc
+++ b/src/snapshot-common.cc
@@ -14,14 +14,27 @@
 namespace v8 {
 namespace internal {
 
+void Snapshot::ReserveSpaceForLinkedInSnapshot(Deserializer* deserializer) {
+  deserializer->AddReservation(NEW_SPACE, new_space_used_);
+  deserializer->AddReservation(OLD_POINTER_SPACE, pointer_space_used_);
+  deserializer->AddReservation(OLD_DATA_SPACE, data_space_used_);
+  deserializer->AddReservation(CODE_SPACE, code_space_used_);
+  deserializer->AddReservation(MAP_SPACE, map_space_used_);
+  deserializer->AddReservation(CELL_SPACE, cell_space_used_);
+  deserializer->AddReservation(PROPERTY_CELL_SPACE, property_cell_space_used_);
+  deserializer->AddReservation(LO_SPACE, lo_space_used_);
+}
+
 
 bool Snapshot::Initialize(Isolate* isolate) {
   if (size_ > 0) {
     base::ElapsedTimer timer;
-    if (FLAG_profile_deserialization) timer.Start();
-
-    SnapshotData snapshot_data(data_, size_);
-    Deserializer deserializer(&snapshot_data);
+    if (FLAG_profile_deserialization) {
+      timer.Start();
+    }
+    SnapshotByteSource source(raw_data_, raw_size_);
+    Deserializer deserializer(&source);
+    ReserveSpaceForLinkedInSnapshot(&deserializer);
     bool success = isolate->Init(&deserializer);
     if (FLAG_profile_deserialization) {
       double ms = timer.Elapsed().InMillisecondsF();
@@ -39,11 +52,22 @@
 
 
 Handle<Context> Snapshot::NewContextFromSnapshot(Isolate* isolate) {
-  if (context_size_ == 0) return Handle<Context>();
-
-  SnapshotData snapshot_data(context_data_, context_size_);
-  Deserializer deserializer(&snapshot_data);
+  if (context_size_ == 0) {
+    return Handle<Context>();
+  }
+  SnapshotByteSource source(context_raw_data_,
+                            context_raw_size_);
+  Deserializer deserializer(&source);
   Object* root;
+  deserializer.AddReservation(NEW_SPACE, context_new_space_used_);
+  deserializer.AddReservation(OLD_POINTER_SPACE, context_pointer_space_used_);
+  deserializer.AddReservation(OLD_DATA_SPACE, context_data_space_used_);
+  deserializer.AddReservation(CODE_SPACE, context_code_space_used_);
+  deserializer.AddReservation(MAP_SPACE, context_map_space_used_);
+  deserializer.AddReservation(CELL_SPACE, context_cell_space_used_);
+  deserializer.AddReservation(PROPERTY_CELL_SPACE,
+                              context_property_cell_space_used_);
+  deserializer.AddReservation(LO_SPACE, context_lo_space_used_);
   deserializer.DeserializePartial(isolate, &root);
   CHECK(root->IsContext());
   return Handle<Context>(Context::cast(root));