Moved zones and zone related stuff in its own directory.

src/compiler/loop-variable-optimizer.cc

 // Copyright 2016 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.
 
 #include "src/compiler/loop-variable-optimizer.h"
 
 #include "src/compiler/common-operator.h"
 #include "src/compiler/graph.h"
 #include "src/compiler/node-marker.h"
 #include "src/compiler/node-properties.h"
 #include "src/compiler/node.h"
-#include "src/zone-containers.h"
-#include "src/zone.h"
+#include "src/zone/zone-containers.h"
+#include "src/zone/zone.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 // Macro for outputting trace information from representation inference.
 #define TRACE(...)                                  \
   do {                                              \
     if (FLAG_trace_turbo_loop) PrintF(__VA_ARGS__); \
   } while (false)
@@ skipping 372 matching lines @@
                                         backedge_value, backedge_control);
         induction_var->phi()->ReplaceInput(1, rename);
       }
     }
   }
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8