Support allocating and calling closures in the new non-optimizing compiler.

runtime/vm/flow_graph_compiler_x64.h

 // Copyright (c) 2012, 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 VM_FLOW_GRAPH_COMPILER_X64_H_
 #define VM_FLOW_GRAPH_COMPILER_X64_H_
 
 #ifndef VM_FLOW_GRAPH_COMPILER_H_
 #error Include flow_graph_compiler.h instead of flow_graph_compiler_x64.h.
 #endif
@@ skipping 24 matching lines @@
   void FinalizeExceptionHandlers(const Code& code);
 
  private:
   struct BlockInfo : public ZoneAllocated {
    public:
     BlockInfo() : label() { }
 
     Label label;
   };
 
-  int stack_local_count() const { return stack_local_count_; }
-  void set_stack_local_count(int count) { stack_local_count_ = count; }
   BlockEntryInstr* current_block() const { return current_block_; }
 
   // Bail out of the flow graph compiler.  Does not return to the caller.
   void Bailout(const char* reason);
 
   virtual void VisitBlocks(const GrowableArray<BlockEntryInstr*>& blocks);
 
   // Emit code to perform a computation, leaving its value in RAX.
 #define DECLARE_VISIT_COMPUTATION(ShortName, ClassName)                        \
   virtual void Visit##ShortName(ClassName* comp);
@@ skipping 39 matching lines @@
   const ParsedFunction& parsed_function_;
   const GrowableArray<BlockEntryInstr*>* blocks_;
 
   // Compiler specific per-block state.  Indexed by block number, so not
   // necessarily the same order as the array of blocks.
   GrowableArray<BlockInfo*> block_info_;
 
   BlockEntryInstr* current_block_;
 
   CodeGenerator::DescriptorList* pc_descriptors_list_;
-  int stack_local_count_;
 
   DISALLOW_COPY_AND_ASSIGN(FlowGraphCompiler);
 };
 
 }  // namespace dart
 
 #endif  // VM_FLOW_GRAPH_COMPILER_X64_H_