Drop V8RecursionScope dependency on ExecutionContext

Source/modules/indexeddb/IDBPendingTransactionMonitor.cpp

Index: Source/modules/indexeddb/IDBPendingTransactionMonitor.cpp
diff --git a/Source/modules/indexeddb/IDBPendingTransactionMonitor.cpp b/Source/modules/indexeddb/IDBPendingTransactionMonitor.cpp
index 6b1b7d1d9b949e4426c27213040f9ffaf8e1a6c4..6196daea7adee26e402c8e7340df034c107ca97f 100644
--- a/Source/modules/indexeddb/IDBPendingTransactionMonitor.cpp
+++ b/Source/modules/indexeddb/IDBPendingTransactionMonitor.cpp
@@ -26,30 +26,12 @@
 #include "config.h"
 #include "modules/indexeddb/IDBPendingTransactionMonitor.h"
 
-#include "core/dom/ExecutionContext.h"
 #include "modules/indexeddb/IDBTransaction.h"
 
 namespace blink {
 
-DEFINE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(IDBPendingTransactionMonitor)
-
-const char* IDBPendingTransactionMonitor::supplementName()
-{
-    return "IDBPendingTransactionMonitor";
-}
-
-inline IDBPendingTransactionMonitor::IDBPendingTransactionMonitor()
-{
-}
-
-IDBPendingTransactionMonitor& IDBPendingTransactionMonitor::from(WillBeHeapSupplementable<ExecutionContext>& context)
+IDBPendingTransactionMonitor::IDBPendingTransactionMonitor()
 {
-    IDBPendingTransactionMonitor* supplement = static_cast<IDBPendingTransactionMonitor*>(WillBeHeapSupplement<ExecutionContext>::from(context, supplementName()));
-    if (!supplement) {
-        supplement = new IDBPendingTransactionMonitor();
-        provideTo(context, supplementName(), adoptPtrWillBeNoop(supplement));
-    }
-    return *supplement;
 }
 
 void IDBPendingTransactionMonitor::addNewTransaction(IDBTransaction& transaction)
@@ -65,12 +47,4 @@ void IDBPendingTransactionMonitor::deactivateNewTransactions()
     m_transactions.clear();
 }
 
-void IDBPendingTransactionMonitor::trace(Visitor* visitor)
-{
-#if ENABLE(OILPAN)
-    visitor->trace(m_transactions);
-#endif
-    WillBeHeapSupplement<ExecutionContext>::trace(visitor);
-}
-
 } // namespace blink