Consistently use only one of virtual/OVERRIDE/FINAL.

src/x87/code-stubs-x87.cc

Index: src/x87/code-stubs-x87.cc
diff --git a/src/x87/code-stubs-x87.cc b/src/x87/code-stubs-x87.cc
index 8925d4ffb35574a2142260eae04a6eafe2c8015d..0cee91f4216925b5a016246a7a3a59ce43595cb9 100644
--- a/src/x87/code-stubs-x87.cc
+++ b/src/x87/code-stubs-x87.cc
@@ -2508,18 +2508,18 @@ void InstanceofStub::Generate(MacroAssembler* masm) {
 
 void StringCharCodeAtGenerator::GenerateFast(MacroAssembler* masm) {
   // If the receiver is a smi trigger the non-string case.
-  STATIC_ASSERT(kSmiTag == 0);
-  __ JumpIfSmi(object_, receiver_not_string_);
-
-  // Fetch the instance type of the receiver into result register.
-  __ mov(result_, FieldOperand(object_, HeapObject::kMapOffset));
-  __ movzx_b(result_, FieldOperand(result_, Map::kInstanceTypeOffset));
-  // If the receiver is not a string trigger the non-string case.
-  __ test(result_, Immediate(kIsNotStringMask));
-  __ j(not_zero, receiver_not_string_);
+  if (check_mode_ == RECEIVER_IS_UNKNOWN) {
+    __ JumpIfSmi(object_, receiver_not_string_);
+
+    // Fetch the instance type of the receiver into result register.
+    __ mov(result_, FieldOperand(object_, HeapObject::kMapOffset));
+    __ movzx_b(result_, FieldOperand(result_, Map::kInstanceTypeOffset));
+    // If the receiver is not a string trigger the non-string case.
+    __ test(result_, Immediate(kIsNotStringMask));
+    __ j(not_zero, receiver_not_string_);
+  }
 
   // If the index is non-smi trigger the non-smi case.
-  STATIC_ASSERT(kSmiTag == 0);
   __ JumpIfNotSmi(index_, &index_not_smi_);
   __ bind(&got_smi_index_);