Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/modules/indexeddb/IDBTransactionTest.cpp

 /*
  * Copyright (C) 2013 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 56 matching lines @@
     ScriptState* getScriptState() const { return m_scope.getScriptState(); }
     ExecutionContext* getExecutionContext() { return m_scope.getScriptState()->getExecutionContext(); }
 
     void deactivateNewTransactions()
     {
         V8PerIsolateData::from(isolate())->runEndOfScopeTasks();
     }
 
 private:
     V8TestingScope m_scope;
-    RefPtrWillBePersistent<ExecutionContext> m_executionContext;
+    Persistent<ExecutionContext> m_executionContext;
 };
 
 class FakeIDBDatabaseCallbacks final : public IDBDatabaseCallbacks {
 public:
     static FakeIDBDatabaseCallbacks* create() { return new FakeIDBDatabaseCallbacks(); }
     void onVersionChange(int64_t oldVersion, int64_t newVersion) override { }
     void onForcedClose() override { }
     void onAbort(int64_t transactionId, DOMException* error) override { }
     void onComplete(int64_t transactionId) override { }
 private:
@@ skipping 68 matching lines @@
     // will not fail if it is, but ASAN would notice the error.
     db->onAbort(transactionId, DOMException::create(AbortError, "Aborted"));
 
     // onAbort() should have cleared the transaction's reference to the database.
     Heap::collectAllGarbage();
     EXPECT_EQ(0u, set.size());
 }
 
 } // namespace
 } // namespace blink