Revert of Fix incorrect sign in scroll and content box offset in absoluteToLocalPoint.

third_party/WebKit/Source/core/layout/LayoutTestHelper.cpp

Index: third_party/WebKit/Source/core/layout/LayoutTestHelper.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutTestHelper.cpp b/third_party/WebKit/Source/core/layout/LayoutTestHelper.cpp
index 518e7dfc25de5887994ca1bc330eb01c31db951f..97db2f3d0bc8a9771207f64b7cbb26930ec7c85a 100644
--- a/third_party/WebKit/Source/core/layout/LayoutTestHelper.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutTestHelper.cpp
@@ -6,7 +6,6 @@
 #include "core/layout/LayoutTestHelper.h"
 
 #include "core/frame/FrameHost.h"
-#include "core/html/HTMLIFrameElement.h"
 #include "platform/graphics/test/FakeGraphicsLayerFactory.h"
 
 namespace blink {
@@ -43,33 +42,10 @@
 
 void RenderingTest::TearDown()
 {
-    if (m_subframe) {
-        m_subframe->detach(FrameDetachType::Remove);
-        static_cast<SingleChildFrameLoaderClient*>(document().frame()->client())->setChild(nullptr);
-        document().frame()->host()->decrementSubframeCount();
-    }
-
     // We need to destroy most of the Blink structure here because derived tests may restore
     // RuntimeEnabledFeatures setting during teardown, which happens before our destructor
     // getting invoked, breaking the assumption that REF can't change during Blink lifetime.
     m_pageHolder = nullptr;
 }
 
-Document& RenderingTest::setupChildIframe(const AtomicString& iframeElementId, const String& htmlContentOfIframe)
-{
-
-    HTMLIFrameElement& iframe = *toHTMLIFrameElement(document().getElementById(iframeElementId));
-    m_frameLoaderClient = FrameLoaderClientWithParent::create(document().frame());
-    m_subframe = LocalFrame::create(m_frameLoaderClient.get(), document().frame()->host(), &iframe);
-    m_subframe->setView(FrameView::create(m_subframe.get(), IntSize(500, 500)));
-    m_subframe->init();
-    static_cast<SingleChildFrameLoaderClient*>(document().frame()->client())->setChild(m_subframe.get());
-    document().frame()->host()->incrementSubframeCount();
-    Document& frameDocument = *iframe.contentDocument();
-
-    frameDocument.setBaseURLOverride(KURL(ParsedURLString, "http://test.com"));
-    frameDocument.body()->setInnerHTML(htmlContentOfIframe, ASSERT_NO_EXCEPTION);
-    return frameDocument;
-}
-
 } // namespace blink