[es6] re-implement rest parameters via desugaring

src/compiler/ast-graph-builder.h

 // Copyright 2014 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_AST_GRAPH_BUILDER_H_
 #define V8_COMPILER_AST_GRAPH_BUILDER_H_
 
 #include "src/ast.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/liveness-analyzer.h"
@@ skipping 244 matching lines @@
   Node* BuildPatchReceiverToGlobalProxy(Node* receiver);
 
   // Builders to create local function, script and block contexts.
   Node* BuildLocalFunctionContext(Node* context);
   Node* BuildLocalScriptContext(Scope* scope);
   Node* BuildLocalBlockContext(Scope* scope);
 
   // Builder to create an arguments object if it is used.
   Node* BuildArgumentsObject(Variable* arguments);
 
-  // Builder to create an array of rest parameters if used
-  Node* BuildRestArgumentsArray(Variable* rest, int index);
-
   // Builder that assigns to the {.this_function} internal variable if needed.
   Node* BuildThisFunctionVariable(Variable* this_function_var);
 
   // Builder that assigns to the {new.target} internal variable if needed.
   Node* BuildNewTargetVariable(Variable* new_target_var);
 
   // Builders for variable load and assignment.
   Node* BuildVariableAssignment(Variable* variable, Node* value,
                                 Token::Value op, const VectorSlotPair& slot,
                                 BailoutId bailout_id,
@@ skipping 282 matching lines @@
 
   // Prepare environment to be used as loop header.
   void PrepareForLoop(BitVector* assigned, bool is_osr = false);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_AST_GRAPH_BUILDER_H_