Upgrade openjpeg to revision 2997.

core/src/fxcodec/fx_libopenjpeg/libopenjpeg20/openjpeg.h

Index: core/src/fxcodec/fx_libopenjpeg/libopenjpeg20/openjpeg.h
diff --git a/core/src/fxcodec/fx_libopenjpeg/libopenjpeg20/openjpeg.h b/core/src/fxcodec/fx_libopenjpeg/libopenjpeg20/openjpeg.h
index b1e1c294c8f4ef3cc3b7a5cdf7d18e01c67eee35..4a8e75ce5a7f3025c2593e33633c084cd8fca9c8 100644
--- a/core/src/fxcodec/fx_libopenjpeg/libopenjpeg20/openjpeg.h
+++ b/core/src/fxcodec/fx_libopenjpeg/libopenjpeg20/openjpeg.h
@@ -76,10 +76,36 @@ Most compilers implement their own version of this keyword ...
 	#define OPJ_DEPRECATED(func) func
 #endif
 
-// PDFium doesn't need to export any of these methods.
-#define OPJ_API
-#define OPJ_LOCAL
-#define OPJ_CALLCONV
+#if defined(OPJ_STATIC) || !defined(_WIN32)
+/* http://gcc.gnu.org/wiki/Visibility */
+#	if __GNUC__ >= 4
+#		if defined(OPJ_STATIC) /* static library uses "hidden" */
+#			define OPJ_API    __attribute__ ((visibility ("hidden")))
+#		else
+#			define OPJ_API    __attribute__ ((visibility ("default")))
+#		endif
+#		define OPJ_LOCAL  __attribute__ ((visibility ("hidden")))
+#	else
+#		define OPJ_API
+#		define OPJ_LOCAL
+#	endif
+#	define OPJ_CALLCONV
+#else
+#	define OPJ_CALLCONV __stdcall
+/*
+The following ifdef block is the standard way of creating macros which make exporting 
+from a DLL simpler. All files within this DLL are compiled with the OPJ_EXPORTS
+symbol defined on the command line. this symbol should not be defined on any project
+that uses this DLL. This way any other project whose source files include this file see 
+OPJ_API functions as being imported from a DLL, wheras this DLL sees symbols
+defined with this macro as being exported.
+*/
+#	if defined(OPJ_EXPORTS) || defined(DLL_EXPORT)
+#		define OPJ_API __declspec(dllexport)
+#	else
+#		define OPJ_API __declspec(dllimport)
+#	endif /* OPJ_EXPORTS */
+#endif /* !OPJ_STATIC || !_WIN32 */
 
 typedef int OPJ_BOOL;
 #define OPJ_TRUE 1