Turned on SkSL->GLSL compiler

src/sksl/ir/SkSLProgram.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_PROGRAM
 #define SKSL_PROGRAM
 
 #include <vector>
 #include <memory>
 
+#include "SkSLModifiers.h"
 #include "SkSLProgramElement.h"
 #include "SkSLSymbolTable.h"
 
 namespace SkSL {
 
 /**
  * Represents a fully-digested program, ready for code generation.
  */
 struct Program {
     enum Kind {
         kFragment_Kind,
         kVertex_Kind
     };
 
-    Program(Kind kind, std::vector<std::unique_ptr<ProgramElement>> elements, 
+    Program(Kind kind, 
+            Modifiers::Flag defaultPrecision,
+            std::vector<std::unique_ptr<ProgramElement>> elements, 
             std::shared_ptr<SymbolTable> symbols)
     : fKind(kind) 
+    , fDefaultPrecision(defaultPrecision)
     , fElements(std::move(elements))
     , fSymbols(symbols) {}
 
     Kind fKind;
-
+    // FIXME handle different types; currently it assumes this is for floats
+    Modifiers::Flag fDefaultPrecision;
     std::vector<std::unique_ptr<ProgramElement>> fElements;
     std::shared_ptr<SymbolTable> fSymbols;
 };
 
 } // namespace
 
 #endif