Remove various Heap* types.

sky/engine/core/dom/ExecutionContext.cpp

Index: sky/engine/core/dom/ExecutionContext.cpp
diff --git a/sky/engine/core/dom/ExecutionContext.cpp b/sky/engine/core/dom/ExecutionContext.cpp
index 7e619f160ebaf73d998c6373beb99511585312a2..940dfcaa45d75ea582b74cbe97fe584c262ec7b1 100644
--- a/sky/engine/core/dom/ExecutionContext.cpp
+++ b/sky/engine/core/dom/ExecutionContext.cpp
@@ -49,10 +49,6 @@ public:
         , m_callStack(callStack)
     {
     }
-    void trace(Visitor* visitor)
-    {
-        visitor->trace(m_callStack);
-    }
     String m_errorMessage;
     int m_lineNumber;
     int m_columnNumber;
@@ -248,13 +244,4 @@ bool ExecutionContext::isIteratingOverObservers() const
     return m_lifecycleNotifier && m_lifecycleNotifier->isIteratingOverObservers();
 }
 
-void ExecutionContext::trace(Visitor* visitor)
-{
-#if ENABLE(OILPAN)
-    visitor->trace(m_pendingExceptions);
-#endif
-    Supplementable<ExecutionContext>::trace(visitor);
-    LifecycleContext<ExecutionContext>::trace(visitor);
-}
-
 } // namespace blink