refactored SkSL VarDeclaration handling

src/sksl/SkSLCompiler.cpp

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
  
 #include "SkSLCompiler.h"
 
 #include <fstream>
@@ skipping 130 matching lines @@
                                       std::vector<std::unique_ptr<ProgramElement>>* result) {
     Parser parser(text, *fTypes, *this);
     std::vector<std::unique_ptr<ASTDeclaration>> parsed = parser.file();
     if (fErrorCount) {
         return;
     }
     for (size_t i = 0; i < parsed.size(); i++) {
         ASTDeclaration& decl = *parsed[i];
         switch (decl.fKind) {
             case ASTDeclaration::kVar_Kind: {
-                std::unique_ptr<VarDeclaration> s = fIRGenerator->convertVarDeclaration(
-                                                                         (ASTVarDeclaration&) decl, 
+                std::unique_ptr<VarDeclarations> s = fIRGenerator->convertVarDeclarations(
+                                                                         (ASTVarDeclarations&) decl, 
                                                                          Variable::kGlobal_Storage);
                 if (s) {
                     result->push_back(std::move(s));
                 }
                 break;
             }
             case ASTDeclaration::kFunction_Kind: {
                 std::unique_ptr<FunctionDefinition> f = fIRGenerator->convertFunction(
                                                                                (ASTFunction&) decl);
                 if (f) {
@@ skipping 97 matching lines @@
                       std::string* out) {
     std::stringstream buffer;
     bool result = this->toGLSL(kind, text, caps, buffer);
     if (result) {
         *out = buffer.str();
     }
     return result;
 }
 
 } // namespace