Use Chrome compatible naming for compiler specifics.

src/compiler/phi-reducer.h

 // 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.
 
 #ifndef V8_COMPILER_PHI_REDUCER_H_
 #define V8_COMPILER_PHI_REDUCER_H_
 
 #include "src/compiler/graph-reducer.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 // Replaces redundant phis if all the inputs are the same or the phi itself.
-class PhiReducer V8_FINAL : public Reducer {
+class PhiReducer FINAL : public Reducer {
  public:
-  virtual Reduction Reduce(Node* node) V8_OVERRIDE {
+  virtual Reduction Reduce(Node* node) OVERRIDE {
     if (node->opcode() != IrOpcode::kPhi &&
         node->opcode() != IrOpcode::kEffectPhi)
       return NoChange();
 
     int n = node->op()->InputCount();
     if (n == 1) return Replace(node->InputAt(0));
 
     Node* replacement = NULL;
     Node::Inputs inputs = node->inputs();
     for (InputIter it = inputs.begin(); n > 0; --n, ++it) {
       Node* input = *it;
       if (input != node && input != replacement) {
         if (replacement != NULL) return NoChange();
         replacement = input;
       }
     }
     DCHECK_NE(node, replacement);
     return Replace(replacement);
   }
 };
 }
 }
 }  // namespace v8::internal::compiler
 
 #endif  // V8_COMPILER_PHI_REDUCER_H_