Support for taking full snapshots from 'dart', not just 'dart_bootstrap'.

runtime/vm/symbols.h

Index: runtime/vm/symbols.h
diff --git a/runtime/vm/symbols.h b/runtime/vm/symbols.h
index 83c7458c255e3cb3fe9b9fd1c5ed766b6d016afe..2473b062124c5b4190e6453663ec48c555ccf1c9 100644
--- a/runtime/vm/symbols.h
+++ b/runtime/vm/symbols.h
@@ -555,19 +555,15 @@ class Symbols : public AllStatic {
   static void InitOnce(Isolate* isolate);
   static void InitOnceFromSnapshot(Isolate* isolate);
 
-  // Add all the symbols that were cached in the VM isolate to this isolate,
-  // we do this when an Isolate is not created from the snapshot so that
-  // we get a unified symbol table that can be be dumped into the VM isolate
-  // snapshot.
-  static void AddPredefinedSymbolsToIsolate();
-
   // Initialize and setup a symbol table for the isolate.
   static void SetupSymbolTable(Isolate* isolate);
 
-  // Treat the symbol table as weak and collect garbage. Answer the number of
-  // symbols deleted from the symbol table because they where not referenced
-  // from anywhere else.
-  static intptr_t Compact(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.
@@ -644,16 +640,16 @@ class Symbols : public AllStatic {
   static RawString* LookupFromSet(Thread* thread, const String& str);
   static RawString* LookupFromDot(Thread* thread, const String& str);
 
+  static void GetStats(Isolate* isolate,
+                       intptr_t* size,
+                       intptr_t* capacity);
+
  private:
   enum {
     kInitialVMIsolateSymtabSize = 1024,
     kInitialSymtabSize = 2048
   };
 
-  static void GetStats(Isolate* isolate,
-                       intptr_t* size,
-                       intptr_t* capacity);
-
   template<typename StringType>
   static RawString* NewSymbol(Thread* thread, const StringType& str);