VM: Fix [StringInterpolateInstr]s canonicalization: null.ToString() should return "null" (not "Null…

runtime/vm/intermediate_language.cc

 // Copyright (c) 2013, 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/intermediate_language.h"
 
 #include "vm/bit_vector.h"
 #include "vm/bootstrap.h"
 #include "vm/compiler.h"
 #include "vm/constant_propagator.h"
@@ skipping 3593 matching lines @@
       if (obj.IsString()) {
         pieces.SetAt(store_index, String::Cast(obj));
       } else if (obj.IsSmi()) {
         const char* cstr = obj.ToCString();
         pieces.SetAt(store_index,
                      String::Handle(zone, String::New(cstr, Heap::kOld)));
       } else if (obj.IsBool()) {
         pieces.SetAt(store_index, Bool::Cast(obj).value() ? Symbols::True()
                                                           : Symbols::False());
       } else if (obj.IsNull()) {
-        pieces.SetAt(store_index, Symbols::Null());
+        pieces.SetAt(store_index, Symbols::null());
       } else {
         return this;
       }
     } else {
       return this;
     }
   }
 
   const String& concatenated =
       String::ZoneHandle(zone, Symbols::FromConcatAll(thread, pieces));
@@ skipping 306 matching lines @@
   set_native_c_function(native_function);
   function().SetIsNativeAutoSetupScope(auto_setup_scope);
   Dart_NativeEntryResolver resolver = library.native_entry_resolver();
   bool is_bootstrap_native = Bootstrap::IsBootstapResolver(resolver);
   set_is_bootstrap_native(is_bootstrap_native);
 }
 
 #undef __
 
 }  // namespace dart