added basic dataflow analysis to skslc

src/sksl/ir/SkSLVarDeclarationsStatement.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
+#ifndef SKSL_VARDECLARATIONSSTATEMENT
+#define SKSL_VARDECLARATIONSSTATEMENT
 
 #include "SkSLStatement.h"
-#include "SkSLVarDeclaration.h"
+#include "SkSLVarDeclarations.h"
 
 namespace SkSL {
 
 /**
  * One or more variable declarations appearing as a statement within a function.
  */
 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<VarDeclarations> fDeclaration;
 
     typedef Statement INHERITED;
 };
 
 } // namespace
 
 #endif