Moved zones and zone related stuff in its own directory.

src/compilation-dependencies.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/compilation-dependencies.h"
 
 #include "src/factory.h"
 #include "src/handles-inl.h"
 #include "src/isolate.h"
 #include "src/objects-inl.h"
-#include "src/zone.h"
+#include "src/zone/zone.h"
 
 namespace v8 {
 namespace internal {
 
 DependentCode* CompilationDependencies::Get(Handle<Object> object) {
   if (object->IsMap()) {
     return Handle<Map>::cast(object)->dependent_code();
   } else if (object->IsPropertyCell()) {
     return Handle<PropertyCell>::cast(object)->dependent_code();
   } else if (object->IsAllocationSite()) {
@@ skipping 123 matching lines @@
       site->SitePointsToLiteral()
           ? JSObject::cast(site->transition_info())->GetElementsKind()
           : site->GetElementsKind();
   if (AllocationSite::GetMode(kind) == TRACK_ALLOCATION_SITE) {
     Insert(DependentCode::kAllocationSiteTransitionChangedGroup, site);
   }
 }
 
 }  // namespace internal
 }  // namespace v8