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

Source/core/fetch/ResourceFetcherTest.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 44 matching lines @@
     {
         return new Resource(request, Resource::Image);
     }
 };
 
 TEST_F(ResourceFetcherTest, StartLoadAfterFrameDetach)
 {
     KURL secureURL(ParsedURLString, "https://secureorigin.test/image.png");
     // Try to request a url. The request should fail, no resource should be returned,
     // and no resource should be present in the cache.
-    RefPtrWillBeRawPtr<ResourceFetcher> fetcher = ResourceFetcher::create(nullptr);
+    ResourceFetcher* fetcher = ResourceFetcher::create(nullptr);
     FetchRequest fetchRequest = FetchRequest(ResourceRequest(secureURL), FetchInitiatorInfo());
     ResourcePtr<Resource> resource = fetcher->requestResource(fetchRequest, TestResourceFactory());
     EXPECT_EQ(resource.get(), static_cast<Resource*>(nullptr));
     EXPECT_EQ(memoryCache()->resourceForURL(secureURL), static_cast<Resource*>(nullptr));
 }
 
 } // namespace blink