VM [KERNEL] Elide null-initialization of the fields

runtime/vm/kernel_to_il.h

 // Copyright (c) 2016, 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_KERNEL_TO_IL_H_
 #define RUNTIME_VM_KERNEL_TO_IL_H_
 
 #if !defined(DART_PRECOMPILED_RUNTIME)
 
 #include "vm/growable_array.h"
@@ skipping 801 matching lines @@
 
   TargetEntryInstr* BuildTargetEntry();
   JoinEntryInstr* BuildJoinEntry();
   JoinEntryInstr* BuildJoinEntry(intptr_t try_index);
 
   Fragment TranslateArguments(Arguments* node, Array* argument_names);
   ArgumentArray GetArguments(int count);
 
   Fragment TranslateInitializers(Class* kernel_klass,
                                  List<Initializer>* initialiers);
+  Fragment TranslateFieldInitializer(Field* field, Expression* init);
 
   Fragment TranslateStatement(Statement* statement);
   Fragment TranslateCondition(Expression* expression, bool* negate);
   Fragment TranslateExpression(Expression* expression);
 
   Fragment TranslateFinallyFinalizers(TryFinallyBlock* outer_finally,
                                       intptr_t target_context_depth);
 
   Fragment TranslateFunctionNode(FunctionNode* node, TreeNode* parent);
 
@@ skipping 245 matching lines @@
 namespace kernel {
 
 RawObject* EvaluateMetadata(TreeNode* const kernel_node);
 RawObject* BuildParameterDescriptor(TreeNode* const kernel_node);
 
 }  // namespace kernel
 }  // namespace dart
 
 #endif  // !defined(DART_PRECOMPILED_RUNTIME)
 #endif  // RUNTIME_VM_KERNEL_TO_IL_H_