refactored SkSL VarDeclaration handling

src/sksl/ast/SkSLASTVarDeclarationStatement.h

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
  
 #ifndef SKSL_ASTVARDECLARATIONSTATEMENT
 #define SKSL_ASTVARDECLARATIONSTATEMENT
 
 #include "SkSLASTStatement.h"
 #include "SkSLASTVarDeclaration.h"
 
 namespace SkSL {
 
 /**
  * A variable declaration appearing as a statement within a function.
  */
 struct ASTVarDeclarationStatement : public ASTStatement {
-    ASTVarDeclarationStatement(std::unique_ptr<ASTVarDeclaration> decl)
+    ASTVarDeclarationStatement(std::unique_ptr<ASTVarDeclarations> decl)
     : INHERITED(decl->fPosition, kVarDeclaration_Kind)
-    , fDeclaration(std::move(decl)) {}
+    , fDeclarations(std::move(decl)) {}
 
     std::string description() const override {
-        return fDeclaration->description() + ";";
+        return fDeclarations->description() + ";";
     }
 
-    std::unique_ptr<ASTVarDeclaration> fDeclaration;
+    std::unique_ptr<ASTVarDeclarations> fDeclarations;
 
     typedef ASTStatement INHERITED;
 };
 
 } // namespace
 
 #endif