Debugger: move implementation to a separate folder.

WATCHLISTS

 # Copyright 2013 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
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@@ skipping 22 matching lines @@
 
 {
   'WATCHLIST_DEFINITIONS': {
     'public_api': {
       'filepath': 'include/',
     },
     'snapshot': {
       'filepath': 'src/snapshot/',
     },
     'debugger': {
-      'filepath': 'src/debug\.(cc|h)|src/.*-debugger\.js|src/runtime/runtime-debug\.cc',
+      'filepath': 'src/debug/',
     },
   },
 
   'WATCHLISTS': {
     'public_api': [
       'phajdan.jr@chromium.org',
     ],
     'snapshot': [
       'yangguo@chromium.org',
     ],
     'debugger': [
       'yangguo@chromium.org',
     ],
   },
 }