Add a layer of indirection between Frame and Page

Source/core/testing/DummyPageHolder.cpp

Index: Source/core/testing/DummyPageHolder.cpp
diff --git a/Source/core/testing/DummyPageHolder.cpp b/Source/core/testing/DummyPageHolder.cpp
index e409550220074f1a0ca62487fb31e08344ea6584..424e07d7e58cfd4a904eccb9cb8575206ef2b648 100644
--- a/Source/core/testing/DummyPageHolder.cpp
+++ b/Source/core/testing/DummyPageHolder.cpp
@@ -54,7 +54,7 @@ DummyPageHolder::DummyPageHolder(const IntSize& initialViewSize)
 
     m_page = adoptPtr(new Page(m_pageClients));
 
-    m_frame = Frame::create(FrameInit::create(0, m_page.get(), &m_frameLoaderClient));
+    m_frame = Frame::create(FrameInit::create(0, &m_page->frameHost(), &m_frameLoaderClient));
     m_frame->setView(FrameView::create(m_frame.get(), initialViewSize));
     m_frame->init();
 }