refactored SkSL VarDeclaration handling

src/sksl/SkSLGLSLCodeGenerator.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_GLSLCODEGENERATOR
 #define SKSL_GLSLCODEGENERATOR
 
@@ skipping 97 matching lines @@
     void writeFunctionDeclaration(const FunctionDeclaration& f);
 
     void writeFunction(const FunctionDefinition& f);
 
     void writeLayout(const Layout& layout);
 
     void writeModifiers(const Modifiers& modifiers);
     
     void writeGlobalVars(const VarDeclaration& vs);
 
-    void writeVarDeclaration(const VarDeclaration& decl);
+    void writeVarDeclarations(const VarDeclarations& decl);
 
     void writeVariableReference(const VariableReference& ref);
 
     void writeExpression(const Expression& expr, Precedence parentPrecedence);
     
     void writeIntrinsicCall(const FunctionCall& c);
 
     void writeFunctionCall(const FunctionCall& c);
 
     void writeConstructor(const Constructor& c);
@@ skipping 39 matching lines @@
     bool fAtLineStart;
     // Keeps track of which struct types we have written. Given that we are unlikely to ever write 
     // more than one or two structs per shader, a simple linear search will be faster than anything 
     // fancier.
     std::vector<const Type*> fWrittenStructs;
 };
 
 }
 
 #endif