refactored SkSL VarDeclaration handling

src/sksl/ir/SkSLVarDeclarationStatement.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_VARDECLARATIONSTATEMENT
 #define SKSL_VARDECLARATIONSTATEMENT
 
 #include "SkSLStatement.h"
 #include "SkSLVarDeclaration.h"
 
 namespace SkSL {
 
 /**
- * A variable declaration appearing as a statement within a function.
+ * One or more variable declarations appearing as a statement within a function.
  */
-struct VarDeclarationStatement : public Statement {
-    VarDeclarationStatement(std::unique_ptr<VarDeclaration> decl)
-    : INHERITED(decl->fPosition, kVarDeclaration_Kind) 
+struct VarDeclarationsStatement : public Statement {
+    VarDeclarationsStatement(std::unique_ptr<VarDeclarations> decl)
+    : INHERITED(decl->fPosition, kVarDeclarations_Kind) 
     , fDeclaration(std::move(decl)) {}
 
     std::string description() const override {
         return fDeclaration->description();
     }
 
-    const std::shared_ptr<VarDeclaration> fDeclaration;
+    const std::shared_ptr<VarDeclarations> fDeclaration;
 
     typedef Statement INHERITED;
 };
 
 } // namespace
 
 #endif