Remove v8- prefix of file name in libsampler.

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 1957 matching lines @@
         'optimize': 'max',
       },
       'dependencies': [
         'v8_libbase',
       ],
       'include_dirs+': [
         '..',
         '../include',
       ],
       'sources': [
-        'libsampler/v8-sampler.cc',
-        'libsampler/v8-sampler.h'
+        'libsampler/sampler.cc',
+        'libsampler/sampler.h'
       ],
       'conditions': [
         ['want_separate_host_toolset==1', {
           'toolsets': ['host', 'target'],
         }, {
           'toolsets': ['target'],
         }],
       ],
       'direct_dependent_settings': {
         'include_dirs': [
@@ skipping 301 matching lines @@
         }],
         ['want_separate_host_toolset==1', {
           'toolsets': ['host'],
         }, {
           'toolsets': ['target'],
         }],
       ],
     },
   ],
 }