Compact the symbol table when creating core snapshots or JIT app snapshots.

runtime/vm/symbols.h

 // 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.
 
 #ifndef RUNTIME_VM_SYMBOLS_H_
 #define RUNTIME_VM_SYMBOLS_H_
 
 #include "vm/growable_array.h"
 #include "vm/object.h"
 #include "vm/snapshot_ids.h"
@@ skipping 553 matching lines @@
 
   // Initialize frequently used symbols in the vm isolate.
   static void InitOnce(Isolate* isolate);
   static void InitOnceFromSnapshot(Isolate* isolate);
 
   // Initialize and setup a symbol table for the isolate.
   static void SetupSymbolTable(Isolate* isolate);
 
   static RawArray* UnifiedSymbolTable();
 
-#if defined(DART_PRECOMPILER)
   // Treat the symbol table as weak and collect garbage.
   static void Compact(Isolate* isolate);
-#endif
 
   // Creates a Symbol given a C string that is assumed to contain
   // UTF-8 encoded characters and '\0' is considered a termination character.
   // TODO(7123) - Rename this to FromCString(....).
   static RawString* New(Thread* thread, const char* cstr) {
     return New(thread, cstr, strlen(cstr));
   }
   static RawString* New(Thread* thread, const char* cstr, intptr_t length);
 
   // Creates a new Symbol from an array of UTF-8 encoded characters.
@@ skipping 42 matching lines @@
 
   // Returns char* of predefined symbol.
   static const char* Name(SymbolId symbol);
 
   static RawString* FromCharCode(Thread* thread, int32_t char_code);
 
   static RawString** PredefinedAddress() {
     return reinterpret_cast<RawString**>(&predefined_);
   }
 
-  static void DumpStats();
+  static void DumpStats(Isolate* isolate);
 
   // Returns Symbol::Null if no symbol is found.
   template <typename StringType>
   static RawString* Lookup(Thread* thread, const StringType& str);
 
   // Returns Symbol::Null if no symbol is found.
   static RawString* LookupFromConcat(Thread* thread,
                                      const String& str1,
                                      const String& str2);
 
@@ skipping 31 matching lines @@
   friend class Serializer;
   friend class Deserializer;
   friend class ApiMessageReader;
 
   DISALLOW_COPY_AND_ASSIGN(Symbols);
 };
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_SYMBOLS_H_