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

runtime/vm/dart.cc

Index: runtime/vm/dart.cc
diff --git a/runtime/vm/dart.cc b/runtime/vm/dart.cc
index cd7dbde9f15319d29d4dfcf006c73250d589489d..9f7ae65312fe0deef72c01947fb9100a383ae8f5 100644
--- a/runtime/vm/dart.cc
+++ b/runtime/vm/dart.cc
@@ -226,7 +226,7 @@ const char* Dart::InitOnce(const uint8_t* vm_isolate_snapshot,
                                      T);
       const Error& error = Error::Handle(reader.ReadVmIsolateSnapshot());
       if (!error.IsNull()) {
-        return error.ToCString();
+        return error.ToErrorCString();
       }
       NOT_IN_PRODUCT(if (tds.enabled()) {
         tds.SetNumArguments(2);
@@ -510,12 +510,6 @@ RawError* Dart::InitializeIsolate(const uint8_t* snapshot_buffer, void* data) {
       I->heap()->PrintSizes();
       MegamorphicCacheTable::PrintSizes(I);
     }
-  } else {
-    // Populate the isolate's symbol table with all symbols from the
-    // VM isolate. We do this so that when we generate a full snapshot
-    // for the isolate we have a unified symbol table that we can then
-    // read into the VM isolate.
-    Symbols::AddPredefinedSymbolsToIsolate();
   }
 
   Object::VerifyBuiltinVtables();