GL_ANGLE_timer_query
https://code.google.com/p/angleproject/source/browse/#git%2Fextensions
GL_ANGLE_timer_query

	GL_QUERY_COUNTER_BITS_ANGLE 0x8864
	GL_CURRENT_QUERY_ANGLE 0x8865
	GL_QUERY_RESULT_ANGLE 0x8866
	GL_QUERY_RESULT_AVAILABLE_ANGLE 0x8867
	GL_TIME_ELAPSED_ANGLE 0x88BF
	GL_TIMESTAMP_ANGLE 0x8E28
	void glBeginQueryANGLE (GLenum target, GLuint id)
	void glDeleteQueriesANGLE (GLsizei n, const GLuint* ids)
	void glEndQueryANGLE (GLenum target)
	void glGenQueriesANGLE (GLsizei n, GLuint* ids)
	void glGetQueryObjecti64vANGLE (GLuint id, GLenum pname, GLint64* params)
	void glGetQueryObjectivANGLE (GLuint id, GLenum pname, GLint* params)
	void glGetQueryObjectui64vANGLE (GLuint id, GLenum pname, GLuint64* params)
	void glGetQueryObjectuivANGLE (GLuint id, GLenum pname, GLuint* params)
	void glGetQueryivANGLE (GLenum target, GLenum pname, GLint* params)
	GLboolean glIsQueryANGLE (GLuint id)
	void glQueryCounterANGLE (GLuint id, GLenum target)
