VM: Save one bool when serializing library prefixes.

runtime/vm/clustered_snapshot.cc

 // Copyright (c) 2016, 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/clustered_snapshot.h"
 
 #include "platform/assert.h"
 #include "vm/bootstrap.h"
 #include "vm/class_finalizer.h"
 #include "vm/dart.h"
@@ skipping 2765 matching lines @@
     intptr_t count = objects_.length();
     for (intptr_t i = 0; i < count; i++) {
       RawLibraryPrefix* prefix = objects_[i];
       RawObject** from = prefix->from();
       RawObject** to = prefix->to();
       for (RawObject** p = from; p <= to; p++) {
         s->WriteRef(*p);
       }
       s->Write<uint16_t>(prefix->ptr()->num_imports_);
       s->Write<bool>(prefix->ptr()->is_deferred_load_);
-      s->Write<bool>(prefix->ptr()->is_loaded_);
     }
   }
 
  private:
   GrowableArray<RawLibraryPrefix*> objects_;
 };
 #endif  // !DART_PRECOMPILED_RUNTIME
 
 
 class LibraryPrefixDeserializationCluster : public DeserializationCluster {
@@ skipping 21 matching lines @@
       Deserializer::InitializeHeader(prefix, kLibraryPrefixCid,
                                      LibraryPrefix::InstanceSize(),
                                      is_vm_object);
       RawObject** from = prefix->from();
       RawObject** to = prefix->to();
       for (RawObject** p = from; p <= to; p++) {
         *p = d->ReadRef();
       }
       prefix->ptr()->num_imports_ = d->Read<uint16_t>();
       prefix->ptr()->is_deferred_load_ = d->Read<bool>();
-      prefix->ptr()->is_loaded_ = d->Read<bool>();
+      prefix->ptr()->is_loaded_ = false;
     }
   }
 };
 
 
 #if !defined(DART_PRECOMPILED_RUNTIME)
 class TypeSerializationCluster : public SerializationCluster {
  public:
   TypeSerializationCluster() { }
   virtual ~TypeSerializationCluster() { }
@@ skipping 2500 matching lines @@
 
   deserializer.ReadVMSnapshot();
 
   Dart::set_instructions_snapshot_buffer(instructions_buffer_);
   Dart::set_data_snapshot_buffer(data_buffer_);
 
   return ApiError::null();
 }
 
 }  // namespace dart