Moved zones and zone related stuff in its own directory.

src/compiler/c-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/macro-assembler.h"
 
 #include "src/compiler/linkage.h"
 
-#include "src/zone.h"
+#include "src/zone/zone.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 namespace {
 LinkageLocation regloc(Register reg, MachineType type) {
   return LinkageLocation::ForRegister(reg.code(), type);
 }
 
@@ skipping 221 matching lines @@
       0,                             // stack_parameter_count
       Operator::kNoProperties,       // properties
       kCalleeSaveRegisters,          // callee-saved registers
       kCalleeSaveFPRegisters,        // callee-saved fp regs
       flags, "c-call");
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8