Remove unneeded variable usage analysis.

tools/gyp/v8.gyp

 # Copyright 2009 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 358 matching lines @@
         '../../src/string-stream.h',
         '../../src/stub-cache.cc',
         '../../src/stub-cache.h',
         '../../src/token.cc',
         '../../src/token.h',
         '../../src/top.cc',
         '../../src/top.h',
         '../../src/unicode-inl.h',
         '../../src/unicode.cc',
         '../../src/unicode.h',
-        '../../src/usage-analyzer.cc',
-        '../../src/usage-analyzer.h',
         '../../src/utils.cc',
         '../../src/utils.h',
         '../../src/v8-counters.cc',
         '../../src/v8-counters.h',
         '../../src/v8.cc',
         '../../src/v8.h',
         '../../src/v8threads.cc',
         '../../src/v8threads.h',
         '../../src/variables.cc',
         '../../src/variables.h',
         '../../src/version.cc',
         '../../src/version.h',
-        '../../src/virtual-frame-inl.h',        
+        '../../src/virtual-frame-inl.h',
+        '../../src/virtual-frame.cc',
         '../../src/virtual-frame.h',
-        '../../src/virtual-frame.cc',
         '../../src/zone-inl.h',
         '../../src/zone.cc',
         '../../src/zone.h',
       ],
       'conditions': [
         ['target_arch=="arm"', {
           'include_dirs+': [
             '../../src/arm',
           ],
           'sources': [
@@ skipping 218 matching lines @@
       ],
       'conditions': [
         [ 'OS=="win"', {
           # This could be gotten by not setting chromium_code, if that's OK.
           'defines': ['_CRT_SECURE_NO_WARNINGS'],
         }],
       ],
     },
   ],
 }