Use explicit type feedback clearing in some tests.

test/mjsunit/fast-element-smi-check.js

Index: test/mjsunit/fast-element-smi-check.js
diff --git a/test/mjsunit/fast-element-smi-check.js b/test/mjsunit/fast-element-smi-check.js
index d0c45fe629118607e6495436ca26b1cf39347db1..3083d5fe74b4608290cec3ceed31c6a3b2499c7a 100644
--- a/test/mjsunit/fast-element-smi-check.js
+++ b/test/mjsunit/fast-element-smi-check.js
@@ -25,7 +25,7 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Flags: --allow-natives-syntax --expose-gc
+// Flags: --allow-natives-syntax
 
 var a = new Array(10);
 
@@ -46,7 +46,7 @@ test_load_set_smi_2(a);
 test_load_set_smi_2(a);
 test_load_set_smi_2(0);
 %DeoptimizeFunction(test_load_set_smi_2);
-gc();  // Makes V8 forget about type information for test_load_set_smi.
+%ClearFunctionTypeFeedback(test_load_set_smi_2);
 
 var b = new Object();
 
@@ -67,4 +67,4 @@ test_load_set_smi_4(b);
 test_load_set_smi_4(b);
 test_load_set_smi_4(0);
 %DeoptimizeFunction(test_load_set_smi_4);
-gc();  // Makes V8 forget about type information for test_load_set_smi.
+%ClearFunctionTypeFeedback(test_load_set_smi_4);