Move phase_zone from CompilationInfo to CompilationPhase.

src/hydrogen.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1940 matching lines @@
   int64_t generate_code_;
   unsigned total_size_;
   int64_t full_code_gen_;
   double source_size_;
 };
 
 
 class HPhase : public CompilationPhase {
  public:
   HPhase(const char* name, HGraph* graph)
-      : CompilationPhase(name, graph->isolate(), graph->zone()),
+      : CompilationPhase(name, graph->info()),
         graph_(graph) { }
   ~HPhase();
 
  private:
   HGraph* graph_;
 
   DISALLOW_COPY_AND_ASSIGN(HPhase);
 };
 
 
@@ skipping 75 matching lines @@
   EmbeddedVector<char, 64> filename_;
   HeapStringAllocator string_allocator_;
   StringStream trace_;
   int indent_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_H_