Split some SharedFunctionInfo's compiler hints off into debugger hints.

src/debug/debug.cc

 // 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.
 
 #include "src/debug/debug.h"
 
 #include <memory>
 
 #include "src/api.h"
 #include "src/arguments.h"
@@ skipping 1542 matching lines @@
   DebugInfoListNode* prev = NULL;
   DebugInfoListNode* current = debug_info_list_;
   while (current != NULL) {
     if (current->debug_info().is_identical_to(debug_info)) {
       // Unlink from list. If prev is NULL we are looking at the first element.
       if (prev == NULL) {
         debug_info_list_ = current->next();
       } else {
         prev->set_next(current->next());
       }
+      shared->set_debug_info(Smi::FromInt(debug_info->debugger_hints()));
       delete current;
-      shared->set_debug_info(DebugInfo::uninitialized());
       return;
     }
     // Move to next in list.
     prev = current;
     current = current->next();
   }
 
   UNREACHABLE();
 }
 
@@ skipping 1090 matching lines @@
   logger_->DebugEvent("Put", message.text());
 }
 
 void LockingCommandMessageQueue::Clear() {
   base::LockGuard<base::Mutex> lock_guard(&mutex_);
   queue_.Clear();
 }
 
 }  // namespace internal
 }  // namespace v8