(blink) Propagate scrolling/marginwidth/marginheight property values to child frame.

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 338 matching lines @@
 
 class StubFrameOwner : public NoBaseWillBeGarbageCollectedFinalized<StubFrameOwner>, public FrameOwner {
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(StubFrameOwner);
 public:
     DEFINE_INLINE_VIRTUAL_TRACE() { FrameOwner::trace(visitor); }
 
     bool isLocal() const override { return false; }
     SandboxFlags sandboxFlags() const override { return SandboxNone; }
     void dispatchLoad() override { }
     void renderFallbackContent() override { }
+    ScrollbarMode scrollingMode() const override { return ScrollbarAuto; }
+    int marginWidth() const override { return -1; }
+    int marginHeight() const override { return -1; }
 };
 
 class FrameFetchContextCachePolicyTest : public ::testing::Test {
 public:
     FrameFetchContextCachePolicyTest() { }
 
 protected:
     void SetUp() override
     {
         dummyPageHolder = DummyPageHolder::create(IntSize(500, 500));
@@ skipping 72 matching lines @@
     // Child frame as part of end to end reload
     document->frame()->loader().setLoadType(FrameLoadTypeReloadFromOrigin);
     EXPECT_EQ(ReloadBypassingCache, childFetchContext->resourceRequestCachePolicy(request, Resource::MainResource));
 
     childDocumentLoader->detachFromFrame();
     childDocumentLoader.clear();
     childFrame->detach(FrameDetachType::Remove);
 }
 
 } // namespace