Use explicit type feedback clearing in some tests.

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

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-// Flags: --allow-natives-syntax --expose-gc
+// Flags: --allow-natives-syntax
 
 var a = new Array(10);
 
 function test_load_set_smi(a) {
   return a[0] = a[0] = 1;
 }
 
 test_load_set_smi(a);
 test_load_set_smi(a);
 test_load_set_smi(123);
 
 function test_load_set_smi_2(a) {
   return a[0] = a[0] = 1;
 }
 
 test_load_set_smi_2(a);
 %OptimizeFunctionOnNextCall(test_load_set_smi_2);
 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();
 
 function test_load_set_smi_3(b) {
   return b[0] = b[0] = 1;
 }
 
 test_load_set_smi_3(b);
 test_load_set_smi_3(b);
 test_load_set_smi_3(123);
 
 function test_load_set_smi_4(b) {
   return b[0] = b[0] = 1;
 }
 
 test_load_set_smi_4(b);
 %OptimizeFunctionOnNextCall(test_load_set_smi_4);
 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);