Create libsampler as V8 sampler library.

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 1905 matching lines @@
           'toolsets': ['target'],
         }],
       ],
       'direct_dependent_settings': {
         'include_dirs': [
           '../include',
         ],
       },
     },
     {
+      'target_name': 'v8_libsampler',
+      'type': 'static_library',
+      'variables': {
+        'optimize': 'max',
+      },
+      'dependencies': [
+        'v8_base',
+      ],
+      'include_dirs+': [
+        '..',
+      ],
+      'sources': [
+        'libsampler/v8-sampler.cc',
+        'libsampler/v8-sampler.h'
+      ],
+      'conditions': [
+        ['want_separate_host_toolset==1', {
+          'toolsets': ['host', 'target'],
+        }, {
+          'toolsets': ['target'],
+        }],
+      ],
+      'direct_dependent_settings': {
+        'include_dirs': [
+          '../include',
+        ],
+      },
+    },
+    {
       'target_name': 'natives_blob',
       'type': 'none',
       'conditions': [
         [ 'v8_use_external_startup_data==1', {
           'conditions': [
             ['want_separate_host_toolset==1', {
               'dependencies': ['js2c#host'],
             }, {
               'dependencies': ['js2c'],
             }],
@@ skipping 298 matching lines @@
         }],
         ['want_separate_host_toolset==1', {
           'toolsets': ['host'],
         }, {
           'toolsets': ['target'],
         }],
       ],
     },
   ],
 }