Debugger: move implementation to a separate folder.

test/mjsunit/es6/debug-function-scopes.js

 // 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 27 matching lines @@
 
   var scope_object = scope_mirror.scopeObject().value();
 
   for (let name in scope_expectations) {
     let actual = scope_object[name];
     let expected = scope_expectations[name];
     assertEquals(expected, actual);
   }
 }
 
-// A copy of the scope types from mirror-debugger.js.
+// A copy of the scope types from debug/mirrors.js.
 var ScopeType = { Global: 0,
                   Local: 1,
                   With: 2,
                   Closure: 3,
                   Catch: 4,
                   Block: 5,
                   Script: 6};
 
 var f1 = (function F1(x) {
   function F2(y) {
@@ skipping 48 matching lines @@
 
 var mirror = Debug.MakeMirror(f2);
 
 assertEquals(5, mirror.scopeCount());
 
 CheckScope(mirror.scope(0), { l3: 9 }, ScopeType.Block);
 CheckScope(mirror.scope(1), { l2: 7 }, ScopeType.Block);
 CheckScope(mirror.scope(2), { v1:3, l0: 0, v3: 5, v6: 11 }, ScopeType.Closure);
 CheckScope(mirror.scope(3), { top_level_let: 255 }, ScopeType.Script);
 CheckScope(mirror.scope(4), {}, ScopeType.Global);