Turned on SkSL->GLSL compiler

src/sksl/ast/SkSLASTModifiersDeclaration.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_ASTMODIFIERDECLARATION
+#define SKSL_ASTMODIFIERDECLARATION
+
+#include "SkSLASTDeclaration.h"
+#include "SkSLASTModifiers.h"
+
+namespace SkSL {
+
+/**
+ * A declaration that consists only of modifiers, e.g.:
+ *
+ * layout(blend_support_all_equations) out;
+ */
+struct ASTModifiersDeclaration : public ASTDeclaration {
+    ASTModifiersDeclaration(ASTModifiers modifiers)
+    : INHERITED(Position(), kModifiers_Kind)
+    , fModifiers(modifiers) {}
+
+    std::string description() const {
+        return fModifiers.description() + ";";
+    }
+
+    ASTModifiers fModifiers;
+
+    typedef ASTDeclaration INHERITED;
+};
+
+} // namespace
+
+#endif