initial checkin of SkSL compiler

src/sksl/SkSLErrorReporter.h

Index: src/sksl/SkSLErrorReporter.h
diff --git a/src/sksl/SkSLErrorReporter.h b/src/sksl/SkSLErrorReporter.h
new file mode 100644
index 0000000000000000000000000000000000000000..26b44711c3063d29f6fea41b94aeee2894444461
--- /dev/null
+++ b/src/sksl/SkSLErrorReporter.h
@@ -0,0 +1,27 @@
+/*
+ * 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_ERRORREPORTER
+#define SKSL_ERRORREPORTER
+
+#include "SkSLPosition.h"
+
+namespace SkSL {
+
+/**
+ * Interface for the compiler to report errors.
+ */
+class ErrorReporter {
+public:
+    virtual ~ErrorReporter() {}
+
+    virtual void error(Position position, std::string msg) = 0;
+};
+
+} // namespace
+
+#endif