vector-based ICs did not update type feedback counts correctly.

src/ia32/code-stubs-ia32.cc

Index: src/ia32/code-stubs-ia32.cc
diff --git a/src/ia32/code-stubs-ia32.cc b/src/ia32/code-stubs-ia32.cc
index 39bef3065b422f9188ed3696ea154f9404468f12..188bb49170783872774cbd306cc90216a118885a 100644
--- a/src/ia32/code-stubs-ia32.cc
+++ b/src/ia32/code-stubs-ia32.cc
@@ -2233,18 +2233,6 @@ void CallICStub::Generate(MacroAssembler* masm) {
   __ cmp(ecx, Immediate(TypeFeedbackVector::UninitializedSentinel(isolate)));
   __ j(equal, &miss);
 
-  if (!FLAG_trace_ic) {
-    // We are going megamorphic. If the feedback is a JSFunction, it is fine
-    // to handle it here. More complex cases are dealt with in the runtime.
-    __ AssertNotSmi(ecx);
-    __ CmpObjectType(ecx, JS_FUNCTION_TYPE, ecx);
-    __ j(not_equal, &miss);
-    __ mov(FieldOperand(ebx, edx, times_half_pointer_size,
-                        FixedArray::kHeaderSize),
-           Immediate(TypeFeedbackVector::MegamorphicSentinel(isolate)));
-    __ jmp(&slow_start);
-  }
-
   // We are here because tracing is on or we are going monomorphic.
   __ bind(&miss);
   GenerateMiss(masm);