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

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

Index: third_party/WebKit/Source/core/layout/LayoutTestHelper.h
diff --git a/third_party/WebKit/Source/core/layout/LayoutTestHelper.h b/third_party/WebKit/Source/core/layout/LayoutTestHelper.h
index 8677ed48624853d30d2c6d94e16c9f81e41b008c..caaeddb2f37b4b054b44805be15bc341ffabd48e 100644
--- a/third_party/WebKit/Source/core/layout/LayoutTestHelper.h
+++ b/third_party/WebKit/Source/core/layout/LayoutTestHelper.h
@@ -38,9 +38,6 @@
         document().view()->updateAllLifecyclePhases();
     }
 
-    // Returns the Document for the iframe.
-    Document& setupChildIframe(const AtomicString& iframeElementId, const String& htmlContentOfIframe);
-
     // Both enables compositing and runs the document lifecycle.
     void enableCompositing()
     {
@@ -49,8 +46,6 @@
     }
 
 private:
-    RefPtrWillBePersistent<LocalFrame> m_subframe;
-    OwnPtrWillBeRawPtr<FrameLoaderClient> m_frameLoaderClient;
     OwnPtr<DummyPageHolder> m_pageHolder;
 };