Consistently use only one of virtual/OVERRIDE/FINAL.

src/compiler/common-operator.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/common-operator.h"
 
 #include "src/assembler.h"
 #include "src/base/lazy-instance.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/opcodes.h"
@@ skipping 342 matching lines @@
    public:
     CallOperator(const CallDescriptor* descriptor, const char* mnemonic)
         : Operator1<const CallDescriptor*>(
               IrOpcode::kCall, descriptor->properties(), mnemonic,
               descriptor->InputCount() + descriptor->FrameStateCount(),
               Operator::ZeroIfPure(descriptor->properties()),
               Operator::ZeroIfPure(descriptor->properties()),
               descriptor->ReturnCount(),
               Operator::ZeroIfPure(descriptor->properties()), 0, descriptor) {}
 
-    virtual void PrintParameter(std::ostream& os) const OVERRIDE {
+    void PrintParameter(std::ostream& os) const OVERRIDE {
       os << "[" << *parameter() << "]";
     }
   };
   return new (zone()) CallOperator(descriptor, "Call");
 }
 
 
 const Operator* CommonOperatorBuilder::Projection(size_t index) {
   return new (zone()) Operator1<size_t>(       // --
       IrOpcode::kProjection, Operator::kPure,  // opcode
       "Projection",                            // name
       1, 0, 0, 1, 0, 0,                        // counts
       index);                                  // parameter
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8