diff -r 000000000000 -r 6474c204b198 gfx/ots/src/metrics.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/ots/src/metrics.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,54 @@
+// Copyright (c) 2011 The Chromium 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 OTS_METRICS_H_
+#define OTS_METRICS_H_
+
+#include <new>
+#include <utility>
+#include <vector>
+
+#include "ots.h"
+
+namespace ots {
+
+struct OpenTypeMetricsHeader {
+  uint32_t version;
+  int16_t ascent;
+  int16_t descent;
+  int16_t linegap;
+  uint16_t adv_width_max;
+  int16_t min_sb1;
+  int16_t min_sb2;
+  int16_t max_extent;
+  int16_t caret_slope_rise;
+  int16_t caret_slope_run;
+  int16_t caret_offset;
+  uint16_t num_metrics;
+};
+
+struct OpenTypeMetricsTable {
+  std::vector<std::pair<uint16_t, int16_t> > entries;
+  std::vector<int16_t> sbs;
+};
+
+bool ParseMetricsHeader(OpenTypeFile *file, Buffer *table,
+                        OpenTypeMetricsHeader *header);
+bool SerialiseMetricsHeader(const ots::OpenTypeFile *file,
+                            OTSStream *out,
+                            const OpenTypeMetricsHeader *header);
+
+bool ParseMetricsTable(const ots::OpenTypeFile *file,
+                       Buffer *table,
+                       const uint16_t num_glyphs,
+                       const OpenTypeMetricsHeader *header,
+                       OpenTypeMetricsTable *metrics);
+bool SerialiseMetricsTable(const ots::OpenTypeFile *file,
+                           OTSStream *out,
+                           const OpenTypeMetricsTable *metrics);
+
+}  // namespace ots
+
+#endif  // OTS_METRICS_H_
+