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

Source/core/inspector/PromiseTracker.cpp

Index: Source/core/inspector/PromiseTracker.cpp
diff --git a/Source/core/inspector/PromiseTracker.cpp b/Source/core/inspector/PromiseTracker.cpp
index da7eee91300d1d72bd4cd23b4b834e247715be3f..61b140bf31cbba314863a48d7088c1c433c1fee8 100644
--- a/Source/core/inspector/PromiseTracker.cpp
+++ b/Source/core/inspector/PromiseTracker.cpp
@@ -82,7 +82,7 @@ void PromiseTracker::didUpdatePromiseParent(const ScriptObject& promise, const S
     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;
 }
 
@@ -92,7 +92,7 @@ void PromiseTracker::didUpdatePromiseState(const ScriptObject& promise, V8Promis
 
     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)