Oilpan: Remove most WillBe types from the code base

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

Index: third_party/WebKit/Source/modules/indexeddb/IDBRequestTest.cpp
diff --git a/third_party/WebKit/Source/modules/indexeddb/IDBRequestTest.cpp b/third_party/WebKit/Source/modules/indexeddb/IDBRequestTest.cpp
index 66ab3994072b1c0f57289b195a310aa70d180cff..ac396b14a39e8402452ab995676fe556395a6868 100644
--- a/third_party/WebKit/Source/modules/indexeddb/IDBRequestTest.cpp
+++ b/third_party/WebKit/Source/modules/indexeddb/IDBRequestTest.cpp
@@ -58,7 +58,7 @@ public:
 
     void SetUp() override
     {
-        m_executionContext = adoptRefWillBeNoop(new NullExecutionContext());
+        m_executionContext = (new NullExecutionContext());
         m_scope.scriptState()->setExecutionContext(m_executionContext.get());
     }
 
@@ -74,7 +74,7 @@ public:
 
 private:
     V8TestingScope m_scope;
-    RefPtrWillBePersistent<ExecutionContext> m_executionContext;
+    Persistent<ExecutionContext> m_executionContext;
 };
 
 TEST_F(IDBRequestTest, EventsAfterStopping)