added basic dataflow analysis to skslc

src/sksl/ir/SkSLInterfaceBlock.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_INTERFACEBLOCK
 #define SKSL_INTERFACEBLOCK
 
 #include "SkSLProgramElement.h"
-#include "SkSLVarDeclaration.h"
+#include "SkSLVarDeclarations.h"
 
 namespace SkSL {
 
 /**
  * An interface block, as in:
  *
  * out gl_PerVertex {
  *   layout(builtin=0) vec4 gl_Position;
  *   layout(builtin=1) float gl_PointSize;
  * };
@@ skipping 19 matching lines @@
 
     const Variable& fVariable;
     const std::shared_ptr<SymbolTable> fTypeOwner;
 
     typedef ProgramElement INHERITED;
 };
 
 } // namespace
 
 #endif