Oilpan: cleanup based on review comments after removal of TreeShared.

Source/core/inspector/PromiseTracker.cpp

 /*
  * Copyright (C) 2014 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 64 matching lines @@
 
     double timestamp = currentTimeMS();
     m_promiseDataMap.set(promise, adoptRef(new PromiseData(promise, ScriptObject(), ScriptValue(), V8PromiseCustom::Pending, timestamp)));
 }
 
 void PromiseTracker::didUpdatePromiseParent(const ScriptObject& promise, const ScriptObject& parentPromise)
 {
     ASSERT(isEnabled());
 
     RefPtr<PromiseData> data = m_promiseDataMap.get(promise);
-    ASSERT(data != NULL && data->m_promise == promise);
+    ASSERT(data && data->m_promise == promise);
     data->m_parentPromise = parentPromise;
 }
 
 void PromiseTracker::didUpdatePromiseState(const ScriptObject& promise, V8PromiseCustom::PromiseState state, const ScriptValue& result)
 {
     ASSERT(isEnabled());
 
     double timestamp = currentTimeMS();
     RefPtr<PromiseData> data = m_promiseDataMap.get(promise);
-    ASSERT(data != NULL && data->m_promise == promise);
+    ASSERT(data && data->m_promise == promise);
     data->m_state = state;
     data->m_result = result;
     if (state == V8PromiseCustom::Fulfilled || state == V8PromiseCustom::Rejected)
         data->didSettlePromise(timestamp);
 }
 
 } // namespace WebCore