[prelim] Additional renderer fontconfig support.

chrome/renderer/renderer_sandbox_support_linux.h

 // Copyright (c) 2009 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 CHROME_RENDERER_RENDERER_SANDBOX_SUPPORT_LINUX_H_
 #define CHROME_RENDERER_RENDERER_SANDBOX_SUPPORT_LINUX_H_
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 12 matching lines @@
 // Returns: the font family or an empty string if the request could not be
 // satisfied.
 std::string getFontFamilyForCharacters(const uint16_t* utf16, size_t num_utf16);
 
 void getRenderStyleForStrike(const char* family, int sizeAndStyle,
                              WebKit::WebFontRenderStyle* out);
 
 // Returns a file descriptor for a shared memory segment.
 int MakeSharedMemorySegmentViaIPC(size_t length);
 
+// Return a file descriptor to the font which best matches the given
+// properties or -1 on failure.
+//   microsoft_charset: specifies the language(s) that the font must cover. See
+//     the description of fdwCharSet in the MSDN documentation for CreateFont.
+//     Its expected that this value will come from another source, thus we
+//     don't attempt to translate it to a Chromium enum. If in doubt, pass 0.
+int MatchFontWithFallback(const std::string& family, bool bold,
+                           bool italic, uint32_t microsoft_charset);
+
+// GetFontTable loads a specified font table from an open SFNT file.
+//   output: (output) on exit, points to a new[] allocated buffer.
+//   output_length: (output) on exit, contains the length of |output|
+//   fd: a file descriptor to the SFNT file. The position doesn't matter.
+//   table: the table in *big-endian* format.
+//
+//   returns: true on success.
+bool GetFontTable(uint8_t** output, size_t* output_length,
+                  int fd, uint32_t table);
+
 };  // namespace render_sandbox_support
 
 #endif  // CHROME_RENDERER_RENDERER_SANDBOX_SUPPORT_LINUX_H_