Oilpan: fix build after r188805, part 2.

Source/modules/fetch/FetchManager.cpp

Index: Source/modules/fetch/FetchManager.cpp
diff --git a/Source/modules/fetch/FetchManager.cpp b/Source/modules/fetch/FetchManager.cpp
index 60b91eedba2fd1a9fe070ac4ba9c120bd029d439..7da441c1d9fc87a213b524726eea6ac19b568418 100644
--- a/Source/modules/fetch/FetchManager.cpp
+++ b/Source/modules/fetch/FetchManager.cpp
@@ -421,8 +421,9 @@ void FetchManager::stop()
 
 void FetchManager::onLoaderFinished(Loader* loader)
 {
-    // We don't use remove here, becuase it may cause recursive deletion.
-    OwnPtr<Loader> p = m_loaders.take(loader);
+    // We don't use remove here, because it may cause recursive deletion.
+    OwnPtrWillBeRawPtr<Loader> p = m_loaders.take(loader);
+    ALLOW_UNUSED_LOCAL(p);
 }
 
 void FetchManager::trace(Visitor* visitor)