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 404 matching lines @@
         '../../src/code-factory.cc',
         '../../src/code-factory.h',
         '../../src/code-stubs.cc',
         '../../src/code-stubs.h',
         '../../src/code-stubs-hydrogen.cc',
         '../../src/code.h',
         '../../src/codegen.cc',
         '../../src/codegen.h',
         '../../src/compilation-cache.cc',
         '../../src/compilation-cache.h',
+        '../../src/compilation-dependencies.cc',
+        '../../src/compilation-dependencies.h',
         '../../src/compilation-statistics.cc',
         '../../src/compilation-statistics.h',
         '../../src/compiler/access-builder.cc',
         '../../src/compiler/access-builder.h',
         '../../src/compiler/all-nodes.cc',
         '../../src/compiler/all-nodes.h',
         '../../src/compiler/ast-graph-builder.cc',
         '../../src/compiler/ast-graph-builder.h',
         '../../src/compiler/ast-loop-assignment-analyzer.cc',
         '../../src/compiler/ast-loop-assignment-analyzer.h',
@@ skipping 1398 matching lines @@
         }],
         ['want_separate_host_toolset==1', {
           'toolsets': ['host'],
         }, {
           'toolsets': ['target'],
         }],
       ],
     },
   ],
 }