[Oilpan] [Reland] Migrate classes under core/fetch to Oilpan heap

Source/core/fetch/MemoryCacheTest.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 72 matching lines @@
     {
         // Save the global memory cache to restore it upon teardown.
         m_globalMemoryCache = replaceMemoryCacheForTesting(MemoryCache::create());
     }
 
     virtual void TearDown()
     {
         replaceMemoryCacheForTesting(m_globalMemoryCache.release());
     }
 
-    OwnPtrWillBePersistent<MemoryCache> m_globalMemoryCache;
+    Persistent<MemoryCache> m_globalMemoryCache;
 };
 
 // Verifies that setters and getters for cache capacities work correcty.
 TEST_F(MemoryCacheTest, CapacityAccounting)
 {
     const size_t sizeMax = ~static_cast<size_t>(0);
     const size_t totalCapacity = sizeMax / 4;
     const size_t minDeadCapacity = sizeMax / 16;
     const size_t maxDeadCapacity = sizeMax / 8;
     memoryCache()->setCapacities(minDeadCapacity, maxDeadCapacity, totalCapacity);
@@ skipping 469 matching lines @@
 
     WillBeHeapVector<RawPtrWillBeMember<Resource>> resources = memoryCache()->resourcesForURL(url);
     EXPECT_EQ(2u, resources.size());
 
     memoryCache()->evictResources();
     EXPECT_FALSE(memoryCache()->contains(resource1.get()));
     EXPECT_FALSE(memoryCache()->contains(resource3.get()));
 }
 
 } // namespace