Consistently use only one of virtual/OVERRIDE/FINAL.

src/compiler/pipeline.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/pipeline.h"
 
 #include <fstream>  // NOLINT(readability/streams)
 #include <sstream>
 
 #include "src/base/platform/elapsed-timer.h"
@@ skipping 284 matching lines @@
       : AstGraphBuilder(local_zone, info, jsgraph, loop_assignment),
         source_positions_(source_positions) {}
 
   bool CreateGraph() {
     SourcePositionTable::Scope pos(source_positions_,
                                    SourcePosition::Unknown());
     return AstGraphBuilder::CreateGraph();
   }
 
 #define DEF_VISIT(type)                                               \
-  virtual void Visit##type(type* node) OVERRIDE {                     \
+  void Visit##type(type* node) OVERRIDE {                             \
     SourcePositionTable::Scope pos(source_positions_,                 \
                                    SourcePosition(node->position())); \
     AstGraphBuilder::Visit##type(node);                               \
   }
   AST_NODE_LIST(DEF_VISIT)
 #undef DEF_VISIT
 
   Node* GetFunctionContext() { return AstGraphBuilder::GetFunctionContext(); }
 
  private:
@@ skipping 759 matching lines @@
 }
 
 
 void Pipeline::TearDown() {
   InstructionOperand::TearDownCaches();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8