Remove content/browser dependency on WebFontRenderStyle.

content/public/common/common_sandbox_support_linux.h

+// Copyright 2017 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 CONTENT_PUBLIC_COMMON_PROCESS_SANDBOX_SUPPORT_LINUX_H_
+#define CONTENT_PUBLIC_COMMON_PROCESS_SANDBOX_SUPPORT_LINUX_H_
+
+#include <stddef.h>
+#include <stdint.h>
+#include <string>
+
+#include "content/common/content_export.h"
+
+namespace content {
+
+// GetFontTable loads a specified font table from an open SFNT file.
+//   fd: a file descriptor to the SFNT file. The position doesn't matter.
+//   table_tag: the table tag in *big-endian* format, or 0 for the entire font.
+//   offset: offset into the table or entire font where loading should start.
+//     The offset must be between 0 and 1 GB - 1.
+//   output: a buffer of size output_length that gets the data.  can be 0, in
+//     which case output_length will be set to the required size in bytes.
+//   output_length: size of output, if it's not 0.
+//
+//   returns: true on success.
+CONTENT_EXPORT bool GetFontTable(int fd,
+                                 uint32_t table_tag,
+                                 off_t offset,
+                                 uint8_t* output,
+                                 size_t* output_length);
+
+};  // namespace content
+
+#endif  // CONTENT_PUBLIC_COMMON_PROCESS_SANDBOX_SUPPORT_LINUX_H_