diff -r 000000000000 -r 6474c204b198 gfx/angle/src/compiler/preprocessor/DirectiveHandlerBase.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/angle/src/compiler/preprocessor/DirectiveHandlerBase.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,43 @@
+//
+// Copyright (c) 2012 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+#ifndef COMPILER_PREPROCESSOR_DIRECTIVE_HANDLER_H_
+#define COMPILER_PREPROCESSOR_DIRECTIVE_HANDLER_H_
+
+#include <string>
+
+namespace pp
+{
+
+struct SourceLocation;
+
+// Base class for handling directives.
+// Preprocessor uses this class to notify the clients about certain
+// preprocessor directives. Derived classes are responsible for
+// handling them in an appropriate manner.
+class DirectiveHandler
+{
+  public:
+    virtual ~DirectiveHandler();
+
+    virtual void handleError(const SourceLocation& loc,
+                             const std::string& msg) = 0;
+
+    // Handle pragma of form: #pragma name[(value)]
+    virtual void handlePragma(const SourceLocation& loc,
+                              const std::string& name,
+                              const std::string& value) = 0;
+
+    virtual void handleExtension(const SourceLocation& loc,
+                                 const std::string& name,
+                                 const std::string& behavior) = 0;
+
+    virtual void handleVersion(const SourceLocation& loc,
+                               int version) = 0;
+};
+
+}  // namespace pp
+#endif  // COMPILER_PREPROCESSOR_DIRECTIVE_HANDLER_H_