[prelim] Additional renderer fontconfig support.

chrome/renderer/renderer_sandbox_support_linux.h

Index: chrome/renderer/renderer_sandbox_support_linux.h
diff --git a/chrome/renderer/renderer_sandbox_support_linux.h b/chrome/renderer/renderer_sandbox_support_linux.h
index 3fa318b400ff41b5010aed4e8b2253c899ea8eea..dab881434b5cd192d00ad3a2b6f2f160344536af 100644
--- a/chrome/renderer/renderer_sandbox_support_linux.h
+++ b/chrome/renderer/renderer_sandbox_support_linux.h
@@ -30,6 +30,25 @@ void getRenderStyleForStrike(const char* family, int sizeAndStyle,
 // 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_