Add link preload as=document support

third_party/WebKit/Source/core/fetch/ImageResourceTest.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 148 matching lines @@
 public:
     static ImageResourceTestMockFetchContext* create()
     {
         return new ImageResourceTestMockFetchContext;
     }
 
     virtual ~ImageResourceTestMockFetchContext() { }
 
     bool allowImage(bool imagesEnabled, const KURL&) const override { return true; }
     bool canRequest(Resource::Type, const ResourceRequest&, const KURL&, const ResourceLoaderOptions&, bool forPreload, FetchRequest::OriginRestriction) const override { return true; }
-    bool shouldLoadNewResource(Resource::Type) const override { return true; }
+    bool shouldLoadNewResource(Resource::Type, const WebURLRequest::FrameType) const override { return true; }
     WebTaskRunner* loadingTaskRunner() const override { return m_runner.get(); }
 
 private:
     ImageResourceTestMockFetchContext()
         :  m_runner(wrapUnique(new scheduler::FakeWebTaskRunner))
     { }
 
     std::unique_ptr<scheduler::FakeWebTaskRunner> m_runner;
 };
 
@@ skipping 451 matching lines @@
     ImageResource* cachedImage = ImageResource::fetch(request, fetcher);
     Platform::current()->getURLLoaderMockFactory()->unregisterURL(testURL);
 
     cachedImage->loader()->didReceiveResponse(nullptr, WrappedResourceResponse(ResourceResponse(testURL, "image/jpeg", 18, nullAtom, String())), nullptr);
     cachedImage->loader()->didReceiveData(nullptr, "notactuallyanimage", 18, 18, 18);
     EXPECT_EQ(Resource::DecodeError, cachedImage->getStatus());
     EXPECT_FALSE(cachedImage->isLoading());
 }
 
 } // namespace blink