Moved zones and zone related stuff in its own directory.

src/v8.gyp

 # Copyright 2012 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 1254 matching lines @@
         'wasm/wasm-js.h',
         'wasm/wasm-macro-gen.h',
         'wasm/wasm-module.cc',
         'wasm/wasm-module.h',
         'wasm/wasm-interpreter.cc',
         'wasm/wasm-interpreter.h',
         'wasm/wasm-opcodes.cc',
         'wasm/wasm-opcodes.h',
         'wasm/wasm-result.cc',
         'wasm/wasm-result.h',
-        'zone.cc',
-        'zone.h',
-        'zone-allocator.h',
-        'zone-containers.h',
+        'zone/accounting-allocator.cc',
+        'zone/accounting-allocator.h',
+        'zone/zone.cc',
+        'zone/zone.h',
+        'zone/zone-allocator.h',
+        'zone/zone-containers.h',
       ],
       'conditions': [
         ['want_separate_host_toolset==1', {
           'toolsets': ['host', 'target'],
         }, {
           'toolsets': ['target'],
         }],
         ['want_separate_host_toolset_mkpeephole==1', {
           'dependencies': ['mkpeephole#host'],
         }, {
@@ skipping 482 matching lines @@
     {
       'target_name': 'v8_libbase',
       'type': 'static_library',
       'variables': {
         'optimize': 'max',
       },
       'include_dirs+': [
         '..',
       ],
       'sources': [
-        'base/accounting-allocator.cc',
-        'base/accounting-allocator.h',
         'base/adapters.h',
         'base/atomic-utils.h',
         'base/atomicops.h',
         'base/atomicops_internals_arm64_gcc.h',
         'base/atomicops_internals_arm_gcc.h',
         'base/atomicops_internals_atomicword_compat.h',
         'base/atomicops_internals_mac.h',
         'base/atomicops_internals_mips_gcc.h',
         'base/atomicops_internals_mips64_gcc.h',
         'base/atomicops_internals_ppc_gcc.h',
@@ skipping 655 matching lines @@
       'conditions': [
         ['want_separate_host_toolset_mkpeephole==1', {
           'toolsets': ['host'],
         }, {
           'toolsets': ['target'],
         }],
       ],
     },
   ],
 }