Oilpan: enable appcache + move DocumentLoader to the heap.

Source/core/loader/FrameFetchContextTest.cpp

 /*
  * Copyright (c) 2015, 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 90 matching lines @@
             fetchRequest.resourceRequest().httpHeaderField("HTTPS").utf8().data());
     }
 
     KURL secureURL;
     RefPtr<SecurityOrigin> exampleOrigin;
     RefPtr<SecurityOrigin> secureOrigin;
 
     OwnPtr<DummyPageHolder> dummyPageHolder;
     // We don't use the DocumentLoader directly in any tests, but need to keep it around as long
     // as the ResourceFetcher and Document live due to indirect usage.
-    RefPtr<DocumentLoader> documentLoader;
+    RefPtrWillBePersistent<DocumentLoader> documentLoader;
     RefPtrWillBePersistent<Document> document;
     FetchContext* fetchContext;
 };
 
 TEST_F(FrameFetchContextUpgradeTest, UpgradeInsecureResourceRequests)
 {
     struct TestCase {
         const char* original;
         const char* upgraded;
     } tests[] = {
@@ skipping 120 matching lines @@
         }
         fetchContext->addClientHintsIfNecessary(fetchRequest);
 
         EXPECT_STREQ(isPresent ? headerValue : "",
             fetchRequest.resourceRequest().httpHeaderField(headerName).utf8().data());
     }
 
     OwnPtr<DummyPageHolder> dummyPageHolder;
     // We don't use the DocumentLoader directly in any tests, but need to keep it around as long
     // as the ResourceFetcher and Document live due to indirect usage.
-    RefPtr<DocumentLoader> documentLoader;
+    RefPtrWillBePersistent<DocumentLoader> documentLoader;
     RefPtrWillBePersistent<Document> document;
     FetchContext* fetchContext;
 };
 
 TEST_F(FrameFetchContextHintsTest, MonitorDPRHints)
 {
     expectHeader("http://www.example.com/1.gif", "DPR", false, "");
     ClientHintsPreferences preferences;
     preferences.setShouldSendDPR(true);
     document->setClientHintsPreferences(preferences);
@@ skipping 39 matching lines @@
     preferences.setShouldSendDPR(true);
     preferences.setShouldSendResourceWidth(true);
     preferences.setShouldSendViewportWidth(true);
     document->setClientHintsPreferences(preferences);
     expectHeader("http://www.example.com/1.gif", "DPR", true, "1");
     expectHeader("http://www.example.com/1.gif", "Width", true, "400", 400);
     expectHeader("http://www.example.com/1.gif", "Viewport-Width", true, "500");
 }
 
 } // namespace
-