Add support for measure mode

src/Layout-test-utils.h

@@ -13,6 +13,6 @@
 
 void test(const char *name, css_node_t *style, css_node_t *expected_layout);
 int tests_finished(void);
-css_dim_t measure(void *context, float width, float height);
+css_dim_t measure(void *context, float width, css_measure_mode_t widthMode, float height, css_measure_mode_t heightMode);
 void init_css_node_children(css_node_t *node, int children_count);
 css_node_t *new_test_css_node(void);