Moved zones and zone related stuff in its own directory.

src/compiler/osr.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_OSR_H_
 #define V8_COMPILER_OSR_H_
 
-#include "src/zone.h"
+#include "src/zone/zone.h"
 
 // TurboFan structures OSR graphs in a way that separates almost all phases of
 // compilation from OSR implementation details. This is accomplished with
 // special control nodes that are added at graph building time. In particular,
 // the graph is built in such a way that typing still computes the best types
 // and optimizations and lowering work unchanged. All that remains is to
 // deconstruct the OSR artifacts before scheduling and code generation.
 
 // Graphs built for OSR from the AstGraphBuilder are structured as follows:
 //                             Start
@@ skipping 98 matching lines @@
  private:
   size_t parameter_count_;
   size_t stack_slot_count_;
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_OSR_H_