Bulk update of Google copyright headers in source files.

src/hydrogen-removable-simulates.h

 // Copyright 2013 the V8 project authors. All rights reserved.
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-//       copyright notice, this list of conditions and the following
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-//       with the distribution.
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-//       contributors may be used to endorse or promote products derived
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+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
 
 #ifndef V8_HYDROGEN_REMOVABLE_SIMULATES_H_
 #define V8_HYDROGEN_REMOVABLE_SIMULATES_H_
 
 #include "hydrogen.h"
 
 namespace v8 {
 namespace internal {
 
 
 class HMergeRemovableSimulatesPhase : public HPhase {
  public:
   explicit HMergeRemovableSimulatesPhase(HGraph* graph)
       : HPhase("H_Merge removable simulates", graph) { }
 
   void Run();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(HMergeRemovableSimulatesPhase);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_REMOVABLE_SIMULATES_H_