Allow the resolved names cache to be lazily created like the exported names cache.

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 1442 matching lines @@
       lib->ptr()->native_entry_symbol_resolver_ = NULL;
       lib->ptr()->index_ = d->Read<int32_t>();
       lib->ptr()->num_imports_ = d->Read<uint16_t>();
       lib->ptr()->load_state_ = d->Read<int8_t>();
       lib->ptr()->corelib_imported_ = d->Read<bool>();
       lib->ptr()->is_dart_scheme_ = d->Read<bool>();
       lib->ptr()->debuggable_ = d->Read<bool>();
       lib->ptr()->is_in_fullsnapshot_ = true;
     }
   }
-
-  void PostLoad(const Array& refs, Snapshot::Kind kind, Zone* zone) {
-    // TODO(rmacnak): This is surprisingly slow, roughly 20% of deserialization
-    // time for the JIT. Maybe make the lookups happy with a null?
-
-    NOT_IN_PRODUCT(TimelineDurationScope tds(
-        Thread::Current(), Timeline::GetIsolateStream(), "PostLoadLibrary"));
-
-    Library& lib = Library::Handle(zone);
-    for (intptr_t i = start_index_; i < stop_index_; i++) {
-      lib ^= refs.At(i);
-      const intptr_t kInitialNameCacheSize = 64;
-      lib.InitResolvedNamesCache(kInitialNameCacheSize);
-    }
-  }
 };
 
 
 #if !defined(DART_PRECOMPILED_RUNTIME)
 class NamespaceSerializationCluster : public SerializationCluster {
  public:
   NamespaceSerializationCluster() {}
   virtual ~NamespaceSerializationCluster() {}
 
   void Trace(Serializer* s, RawObject* object) {
@@ skipping 4078 matching lines @@
     thread_->isolate()->SetupImagePage(data_buffer_,
                                        /* is_executable */ false);
   }
 
   deserializer.ReadIsolateSnapshot(thread_->isolate()->object_store());
 
   return ApiError::null();
 }
 
 }  // namespace dart