diff -r 000000000000 -r 6474c204b198 gfx/angle/src/compiler/preprocessor/Input.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/angle/src/compiler/preprocessor/Input.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,49 @@
+//
+// Copyright (c) 2011 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_INPUT_H_
+#define COMPILER_PREPROCESSOR_INPUT_H_
+
+#include <stddef.h>
+#include <vector>
+
+namespace pp
+{
+
+// Holds and reads input for Lexer.
+class Input
+{
+  public:
+    Input();
+    Input(size_t count, const char* const string[], const int length[]);
+
+    size_t count() const { return mCount; }
+    const char* string(size_t index) const { return mString[index]; }
+    size_t length(size_t index) const { return mLength[index]; }
+
+    size_t read(char* buf, size_t maxSize);
+
+    struct Location
+    {
+        size_t sIndex;  // String index;
+        size_t cIndex;  // Char index.
+
+        Location() : sIndex(0), cIndex(0) { }
+    };
+    const Location& readLoc() const { return mReadLoc; }
+
+  private:
+    // Input.
+    size_t mCount;
+    const char* const* mString;
+    std::vector<size_t> mLength;
+
+    Location mReadLoc;
+};
+
+}  // namespace pp
+#endif  // COMPILER_PREPROCESSOR_INPUT_H_
+