Revert of Reduced skslc memory consumption

src/sksl/ir/SkSLFunctionCall.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_FUNCTIONCALL
 #define SKSL_FUNCTIONCALL
 
 #include "SkSLExpression.h"
 #include "SkSLFunctionDeclaration.h"
 
 namespace SkSL {
 
 /**
  * A function invocation.
  */
 struct FunctionCall : public Expression {
-    FunctionCall(Position position, const Type& type, const FunctionDeclaration& function,
+    FunctionCall(Position position, const FunctionDeclaration& function,
                  std::vector<std::unique_ptr<Expression>> arguments)
-    : INHERITED(position, kFunctionCall_Kind, type)
+    : INHERITED(position, kFunctionCall_Kind, function.fReturnType)
     , fFunction(std::move(function))
     , fArguments(std::move(arguments)) {}
 
     std::string description() const override {
         std::string result = fFunction.fName + "(";
         std::string separator = "";
         for (size_t i = 0; i < fArguments.size(); i++) {
             result += separator;
             result += fArguments[i]->description();
             separator = ", ";
         }
         result += ")";
         return result;
     }
 
     const FunctionDeclaration& fFunction;
     const std::vector<std::unique_ptr<Expression>> fArguments;
 
     typedef Expression INHERITED;
 };
 
 } // namespace
 
 #endif