Eliminate imported_into pointers in Library

runtime/vm/raw_object_snapshot.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/bigint_operations.h"
 #include "vm/object.h"
 #include "vm/object_store.h"
 #include "vm/snapshot.h"
 #include "vm/symbols.h"
 #include "vm/visitor.h"
@@ skipping 736 matching lines @@
   } else {
     // Allocate library object.
     library = NEW_OBJECT(Library);
 
     // Set the object tags.
     library.set_tags(tags);
 
     // Set all non object fields.
     library.raw_ptr()->index_ = reader->ReadIntptrValue();
     library.raw_ptr()->num_imports_ = reader->ReadIntptrValue();
-    library.raw_ptr()->num_imported_into_ = reader->ReadIntptrValue();
     library.raw_ptr()->num_anonymous_ = reader->ReadIntptrValue();
     library.raw_ptr()->corelib_imported_ = reader->Read<bool>();
     library.raw_ptr()->debuggable_ = reader->Read<bool>();
     library.raw_ptr()->load_state_ = reader->Read<int8_t>();
     // The native resolver is not serialized.
     Dart_NativeEntryResolver resolver =
         reader->Read<Dart_NativeEntryResolver>();
     ASSERT(resolver == NULL);
     library.set_native_entry_resolver(resolver);
     // The cache of loaded scripts is not serialized.
@@ skipping 28 matching lines @@
   writer->WriteIntptrValue(writer->GetObjectTags(this));
 
   if (RawObject::IsCreatedFromSnapshot(writer->GetObjectTags(this))) {
     ASSERT(kind != Snapshot::kFull);
     // Write out library URL so that it can be looked up when reading.
     writer->WriteObjectImpl(ptr()->url_);
   } else {
     // Write out all non object fields.
     writer->WriteIntptrValue(ptr()->index_);
     writer->WriteIntptrValue(ptr()->num_imports_);
-    writer->WriteIntptrValue(ptr()->num_imported_into_);
     writer->WriteIntptrValue(ptr()->num_anonymous_);
     writer->Write<bool>(ptr()->corelib_imported_);
     writer->Write<bool>(ptr()->debuggable_);
     writer->Write<int8_t>(ptr()->load_state_);
     // We do not serialize the native resolver over, this needs to be explicitly
     // set after deserialization.
     writer->Write<Dart_NativeEntryResolver>(NULL);
     // We do not write the loaded_scripts_ cache to the snapshot. It gets
     // set to NULL when reading the library from the snapshot, and will
     // be rebuilt lazily.
@@ skipping 1268 matching lines @@
   // Write out the class and tags information.
   writer->WriteIndexedObject(kWeakPropertyCid);
   writer->WriteIntptrValue(writer->GetObjectTags(this));
 
   // Write out all the other fields.
   writer->Write<RawObject*>(ptr()->key_);
   writer->Write<RawObject*>(ptr()->value_);
 }
 
 }  // namespace dart