Debugger: move implementation to a separate folder.

src/debug/liveedit.js

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // LiveEdit feature implementation. The script should be executed after
-// debug-debugger.js.
+// debug.js.
 
 // A LiveEdit namespace. It contains functions that modifies JavaScript code
 // according to changes of script source (if possible).
 //
 // When new script source is put in, the difference is calculated textually,
 // in form of list of delete/add/change chunks. The functions that include
 // change chunk(s) get recompiled, or their enclosing functions are
 // recompiled instead.
 // If the function may not be recompiled (e.g. it was completely erased in new
 // version of the script) it remains unchanged, but the code that could
@@ skipping 1081 matching lines @@
     return ProcessOldNode(old_code_tree);
   }
 
   // Functions are public for tests.
   this.TestApi = {
     PosTranslator: PosTranslator,
     CompareStrings: CompareStrings,
     ApplySingleChunkPatch: ApplySingleChunkPatch
   };
 };