diff -r 000000000000 -r 6474c204b198 gfx/ots/ots-visibility.patch
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/ots/ots-visibility.patch	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,88 @@
+diff --git a/gfx/ots/include/opentype-sanitiser.h b/gfx/ots/include/opentype-sanitiser.h
+--- a/gfx/ots/include/opentype-sanitiser.h
++++ b/gfx/ots/include/opentype-sanitiser.h
+@@ -1,15 +1,35 @@
+ // 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 OPENTYPE_SANITISER_H_
+ #define OPENTYPE_SANITISER_H_
+ 
++#if defined(_WIN32) || defined(__CYGWIN__)
++  #define OTS_DLL_IMPORT __declspec(dllimport)
++  #define OTS_DLL_EXPORT __declspec(dllexport)
++#else
++  #if __GNUC__ >= 4
++    #define OTS_DLL_IMPORT __attribute__((visibility ("default")))
++    #define OTS_DLL_EXPORT __attribute__((visibility ("default")))
++  #endif
++#endif
++
++#ifdef OTS_DLL
++  #ifdef OTS_DLL_EXPORTS
++    #define OTS_API OTS_DLL_EXPORT
++  #else
++    #define OTS_API OTS_DLL_IMPORT
++  #endif
++#else
++  #define OTS_API
++#endif
++
+ #if defined(_WIN32)
+ #include <stdlib.h>
+ typedef signed char int8_t;
+ typedef unsigned char uint8_t;
+ typedef short int16_t;
+ typedef unsigned short uint16_t;
+ typedef int int32_t;
+ typedef unsigned int uint32_t;
+@@ -182,45 +202,45 @@ class OTSStream {
+ // -----------------------------------------------------------------------------
+ // Process a given OpenType file and write out a sanitised version
+ //   output: a pointer to an object implementing the OTSStream interface. The
+ //     sanitisied output will be written to this. In the even of a failure,
+ //     partial output may have been written.
+ //   input: the OpenType file
+ //   length: the size, in bytes, of |input|
+ // -----------------------------------------------------------------------------
+-bool Process(OTSStream *output, const uint8_t *input, size_t length);
++bool OTS_API Process(OTSStream *output, const uint8_t *input, size_t length);
+ 
+ // Signature of the function to be provided by the client in order to report errors.
+ // The return type is a boolean so that it can be used within an expression,
+ // but the actual value is ignored. (Suggested convention is to always return 'false'.)
+ #ifdef __GCC__
+ #define MSGFUNC_FMT_ATTR __attribute__((format(printf, 2, 3)))
+ #else
+ #define MSGFUNC_FMT_ATTR
+ #endif
+ typedef bool (*MessageFunc)(void *user_data, const char *format, ...)  MSGFUNC_FMT_ATTR;
+ 
+ // Set a callback function that will be called when OTS is reporting an error.
+-void SetMessageCallback(MessageFunc func, void *user_data);
++void OTS_API SetMessageCallback(MessageFunc func, void *user_data);
+ 
+ enum TableAction {
+   TABLE_ACTION_DEFAULT,  // Use OTS's default action for that table
+   TABLE_ACTION_SANITIZE, // Sanitize the table, potentially droping it
+   TABLE_ACTION_PASSTHRU, // Serialize the table unchanged
+   TABLE_ACTION_DROP      // Drop the table
+ };
+ 
+ // Signature of the function to be provided by the client to decide what action
+ // to do for a given table.
+ typedef TableAction (*TableActionFunc)(uint32_t tag, void *user_data);
+ 
+ // Set a callback function that will be called when OTS needs to decide what to
+ // do for a font table.
+-void SetTableActionCallback(TableActionFunc func, void *user_data);
++void OTS_API SetTableActionCallback(TableActionFunc func, void *user_data);
+ 
+ // Force to disable debug output even when the library is compiled with
+ // -DOTS_DEBUG.
+ void DisableDebugOutput();
+ 
+ // Enable WOFF2 support(experimental).
+ void EnableWOFF2();
+