Move Hydrogen and Lithium to src/crankshaft/

src/crankshaft/hydrogen-dce.h

 // Copyright 2013 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_HYDROGEN_DCE_H_
-#define V8_HYDROGEN_DCE_H_
+#ifndef V8_CRANKSHAFT_HYDROGEN_DCE_H_
+#define V8_CRANKSHAFT_HYDROGEN_DCE_H_
 
-#include "src/hydrogen.h"
+#include "src/crankshaft/hydrogen.h"
 
 namespace v8 {
 namespace internal {
 
 
 class HDeadCodeEliminationPhase : public HPhase {
  public:
   explicit HDeadCodeEliminationPhase(HGraph* graph)
       : HPhase("H_Dead code elimination", graph) { }
 
   void Run() {
     MarkLiveInstructions();
     RemoveDeadInstructions();
   }
 
  private:
   void MarkLive(HValue* instr, ZoneList<HValue*>* worklist);
   void PrintLive(HValue* ref, HValue* instr);
   void MarkLiveInstructions();
   void RemoveDeadInstructions();
 };
 
 
 }  // namespace internal
 }  // namespace v8
 
-#endif  // V8_HYDROGEN_DCE_H_
+#endif  // V8_CRANKSHAFT_HYDROGEN_DCE_H_