Remove an out-dated TODO in MainThreadDebugger

third_party/WebKit/Source/core/inspector/MainThreadDebugger.cpp

 /*
  * Copyright (c) 2011 Google Inc. 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
@@ skipping 57 matching lines @@
 }
 
 Mutex& creationMutex()
 {
     DEFINE_THREAD_SAFE_STATIC_LOCAL(Mutex, mutex, (new Mutex));
     return mutex;
 }
 
 }
 
-// TODO(Oilpan): avoid keeping a raw reference separate from the
-// owner one; does not enable heap-movable objects.
 MainThreadDebugger* MainThreadDebugger::s_instance = nullptr;
 
 MainThreadDebugger::MainThreadDebugger(v8::Isolate* isolate)
     : ThreadDebugger(isolate)
     , m_taskRunner(adoptPtr(new InspectorTaskRunner()))
 {
     MutexLocker locker(creationMutex());
     ASSERT(!s_instance);
     s_instance = this;
 }
@@ skipping 257 matching lines @@
                 return;
             if (!nodes->Set(context, index++, toV8(node, info.Holder(), info.GetIsolate())).FromMaybe(false))
                 return;
         }
         info.GetReturnValue().Set(nodes);
     }
     exceptionState.throwIfNeeded();
 }
 
 } // namespace blink