Update from https://crrev.com/317530

third_party/ots/src/vhea.cc

Index: third_party/ots/src/vhea.cc
diff --git a/third_party/ots/src/vhea.cc b/third_party/ots/src/vhea.cc
new file mode 100644
index 0000000000000000000000000000000000000000..c689a834f0c19e7465b9c1e8fd315f6bfd349480
--- /dev/null
+++ b/third_party/ots/src/vhea.cc
@@ -0,0 +1,59 @@
+// 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.
+
+#include "vhea.h"
+
+#include "gsub.h"
+#include "head.h"
+#include "maxp.h"
+
+// vhea - Vertical Header Table
+// http://www.microsoft.com/typography/otspec/vhea.htm
+
+#define TABLE_NAME "vhea"
+
+namespace ots {
+
+bool ots_vhea_parse(OpenTypeFile *file, const uint8_t *data, size_t length) {
+  Buffer table(data, length);
+  OpenTypeVHEA *vhea = new OpenTypeVHEA;
+  file->vhea = vhea;
+
+  if (!table.ReadU32(&vhea->header.version)) {
+    return OTS_FAILURE_MSG("Failed to read version");
+  }
+  if (vhea->header.version != 0x00010000 &&
+      vhea->header.version != 0x00011000) {
+    return OTS_FAILURE_MSG("Bad vhea version %x", vhea->header.version);
+  }
+
+  if (!ParseMetricsHeader(file, &table, &vhea->header)) {
+    return OTS_FAILURE_MSG("Failed to parse metrics in vhea");
+  }
+
+  return true;
+}
+
+bool ots_vhea_should_serialise(OpenTypeFile *file) {
+  // vhea should'nt serialise when vmtx doesn't exist.
+  // Firefox developer pointed out that vhea/vmtx should serialise iff GSUB is
+  // preserved. See http://crbug.com/77386
+  return file->vhea != NULL && file->vmtx != NULL &&
+      ots_gsub_should_serialise(file);
+}
+
+bool ots_vhea_serialise(OTSStream *out, OpenTypeFile *file) {
+  if (!SerialiseMetricsHeader(file, out, &file->vhea->header)) {
+    return OTS_FAILURE_MSG("Failed to write vhea metrics");
+  }
+  return true;
+}
+
+void ots_vhea_free(OpenTypeFile *file) {
+  delete file->vhea;
+}
+
+}  // namespace ots
+
+#undef TABLE_NAME