Moved zones and zone related stuff in its own directory.

src/compiler/wasm-linkage.cc

 // Copyright 2015 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/assembler.h"
 #include "src/base/lazy-instance.h"
 #include "src/macro-assembler.h"
 #include "src/register-configuration.h"
 
 #include "src/wasm/wasm-module.h"
 
 #include "src/compiler/linkage.h"
 
-#include "src/zone.h"
+#include "src/zone/zone.h"
 
 namespace v8 {
 namespace internal {
 // TODO(titzer): this should not be in the WASM namespace.
 namespace wasm {
 
 using compiler::LocationSignature;
 using compiler::CallDescriptor;
 using compiler::LinkageLocation;
 
@@ skipping 344 matching lines @@
       descriptor->CalleeSavedFPRegisters(),  // callee-saved fp regs
       descriptor->flags(),                   // flags
       descriptor->debug_name());
 
   return descriptor;
 }
 
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8