Revert of Updated Khronos GLES2 headers.

third_party/khronos/GLES2/gl2platform.h

Index: third_party/khronos/GLES2/gl2platform.h
diff --git a/third_party/khronos/GLES2/gl2platform.h b/third_party/khronos/GLES2/gl2platform.h
index 89d4d44dc1bbfd1f19ed2789901276561346f7d6..ae4ec48d2218c385e1388200ce5178c49f8c770a 100644
--- a/third_party/khronos/GLES2/gl2platform.h
+++ b/third_party/khronos/GLES2/gl2platform.h
@@ -1,7 +1,7 @@
 #ifndef __gl2platform_h_
 #define __gl2platform_h_
 
-/* $Revision: 23328 $ on $Date:: 2013-10-02 02:28:28 -0700 #$ */
+/* $Revision: 10602 $ on $Date:: 2010-03-04 22:35:34 -0800 #$ */
 
 /*
  * This document is licensed under the SGI Free Software B License Version
@@ -19,12 +19,25 @@
 
 #include <KHR/khrplatform.h>
 
-#ifndef GL_APICALL
-#define GL_APICALL  KHRONOS_APICALL
+#if defined(COMPONENT_BUILD)
+#if defined(WIN32)
+#if defined(GLES2_C_LIB_IMPLEMENTATION)
+#define GL_APICALL __declspec(dllexport)
+#else
+#define GL_APICALL __declspec(dllimport)
+#endif  /* defined(GLES2_C_LIB_IMPLEMENTATION) */
+#else /* defined(WIN32) */
+#define GL_APICALL __attribute__((visibility("default")))
+#endif
+#else
+#   define GL_APICALL
 #endif
 
 #ifndef GL_APIENTRY
 #define GL_APIENTRY KHRONOS_APIENTRY
 #endif
 
+#undef GL_APIENTRY
+#define GL_APIENTRY
+
 #endif /* __gl2platform_h_ */