Refactor compilation dependency handling.

tools/gyp/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 569 matching lines @@
         '../../src/cpu-profiler.h',
         '../../src/date.cc',
         '../../src/date.h',
         '../../src/dateparser-inl.h',
         '../../src/dateparser.cc',
         '../../src/dateparser.h',
         '../../src/debug.cc',
         '../../src/debug.h',
         '../../src/deoptimizer.cc',
         '../../src/deoptimizer.h',
+        '../../src/dependencies.cc',
+        '../../src/dependencies.h',
         '../../src/disasm.h',
         '../../src/disassembler.cc',
         '../../src/disassembler.h',
         '../../src/diy-fp.cc',
         '../../src/diy-fp.h',
         '../../src/double.h',
         '../../src/dtoa.cc',
         '../../src/dtoa.h',
         '../../src/effects.h',
         '../../src/elements-kind.cc',
@@ skipping 1230 matching lines @@
         }],
         ['want_separate_host_toolset==1', {
           'toolsets': ['host'],
         }, {
           'toolsets': ['target'],
         }],
       ],
     },
   ],
 }