Named all zones in the project

src/zone/zone.h

 // Copyright 2012 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_ZONE_ZONE_H_
 #define V8_ZONE_ZONE_H_
 
 #include <limits>
 
 #include "src/base/hashmap.h"
 #include "src/base/logging.h"
 #include "src/globals.h"
 #include "src/list.h"
 #include "src/splay-tree.h"
 #include "src/zone/accounting-allocator.h"
 
+#ifndef ZONE_NAME
+#define STRINGIFY(x) #x
+#define TOSTRING(x) STRINGIFY(x)
+#define ZONE_NAME __FILE__ ":" TOSTRING(__LINE__)
+#endif
+
 namespace v8 {
 namespace internal {
 
 // The Zone supports very fast allocation of small chunks of
 // memory. The chunks cannot be deallocated individually, but instead
 // the Zone supports deallocating all chunks in one fast
 // operation. The Zone is used to hold temporary data structures like
 // the abstract syntax tree, which is deallocated after compilation.
 //
 // Note: There is no need to initialize the Zone; the first time an
 // allocation is attempted, a segment of memory will be requested
 // through the allocator.
 //
 // Note: The implementation is inherently not thread safe. Do not use
 // from multi-threaded code.
 class V8_EXPORT_PRIVATE Zone final {
  public:
-  explicit Zone(AccountingAllocator* allocator, const char* name = "unnamed");
+  Zone(AccountingAllocator* allocator, const char* name);
   ~Zone();
 
   // Allocate 'size' bytes of memory in the Zone; expands the Zone by
   // allocating new segments of memory on demand using malloc().
   void* New(size_t size);
 
   template <typename T>
   T* NewArray(size_t length) {
     DCHECK_LT(length, std::numeric_limits<size_t>::max() / sizeof(T));
     return static_cast<T*>(New(length * sizeof(T)));
@@ skipping 172 matching lines @@
 
 typedef base::PointerTemplateHashMapImpl<ZoneAllocationPolicy> ZoneHashMap;
 
 typedef base::CustomMatcherTemplateHashMapImpl<ZoneAllocationPolicy>
     CustomMatcherZoneHashMap;
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_ZONE_ZONE_H_