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 8f5fcfeaa0249c0822c43dec450d0b4bd7eef527..0bc7a50932633d94643cb15d42df054b2f33c3c7 100644
--- a/runtime/vm/dart.cc
+++ b/runtime/vm/dart.cc
@@ -533,11 +533,6 @@ RawError* Dart::InitializeIsolate(const uint8_t* snapshot_buffer, void* data) {
     }
   } else {
     ASSERT(snapshot_kind_ == Snapshot::kNone);
-    // 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();