Fix failing tests and rollback two from Testing change for failing unit test

src/debug.cc

 // Copyright 2006-2008 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 1769 matching lines @@
   return false;
 }
 
 
 void Debug::FramesHaveBeenDropped(StackFrame::Id new_break_frame_id,
                                   FrameDropMode mode,
                                   Object** restarter_frame_function_pointer) {
   thread_local_.frame_drop_mode_ = mode;
   thread_local_.break_frame_id_ = new_break_frame_id;
   thread_local_.restarter_frame_function_pointer_ =
-  // Temporary disabled for failing test investigation.
-  //    restarter_frame_function_pointer;
-      NULL;
+      restarter_frame_function_pointer;
 }
 
 
 bool Debug::IsDebugGlobal(GlobalObject* global) {
   return IsLoaded() && global == Debug::debug_context()->global();
 }
 
 
 void Debug::ClearMirrorCache() {
   HandleScope scope;
@@ skipping 1213 matching lines @@
     {
       Locker locker;
       Debugger::CallMessageDispatchHandler();
     }
   }
 }
 
 #endif  // ENABLE_DEBUGGER_SUPPORT
 
 } }  // namespace v8::internal