[stubs] Add initializing constructor to CSA::Variable

src/compiler/code-assembler.h

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_COMPILER_CODE_ASSEMBLER_H_
 #define V8_COMPILER_CODE_ASSEMBLER_H_
 
 #include <map>
 #include <memory>
 
@@ skipping 395 matching lines @@
 
   CodeAssemblerState* state_;
 
   DISALLOW_COPY_AND_ASSIGN(CodeAssembler);
 };
 
 class CodeAssemblerVariable {
  public:
   explicit CodeAssemblerVariable(CodeAssembler* assembler,
                                  MachineRepresentation rep);
+  explicit CodeAssemblerVariable(CodeAssembler* assembler,
+                                 MachineRepresentation rep,
+                                 Node* initial_value);
   ~CodeAssemblerVariable();
   void Bind(Node* value);
   Node* value() const;
   MachineRepresentation rep() const;
   bool IsBound() const;
 
  private:
   friend class CodeAssemblerLabel;
   friend class CodeAssemblerState;
   class Impl;
@@ skipping 79 matching lines @@
   CodeAssemblerCallback call_epilogue_;
 
   DISALLOW_COPY_AND_ASSIGN(CodeAssemblerState);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_CODE_ASSEMBLER_H_