Revert "Adapt and reland old position sticky implementation from https://codereview.chromium.org/34…

third_party/WebKit/Source/core/frame/FrameView.cpp

Index: third_party/WebKit/Source/core/frame/FrameView.cpp
diff --git a/third_party/WebKit/Source/core/frame/FrameView.cpp b/third_party/WebKit/Source/core/frame/FrameView.cpp
index a72a71e94f5af953a77b6eb59fb14e9e12220e6d..87231c2db9f2ca6213ad91c7908e7405a9ed9801 100644
--- a/third_party/WebKit/Source/core/frame/FrameView.cpp
+++ b/third_party/WebKit/Source/core/frame/FrameView.cpp
@@ -135,7 +135,6 @@ FrameView::FrameView(LocalFrame* frame)
     , m_safeToPropagateScrollToParent(true)
     , m_isTrackingPaintInvalidations(false)
     , m_scrollCorner(nullptr)
-    , m_stickyPositionObjectCount(0)
     , m_inputEventsScaleFactorForEmulation(1)
     , m_layoutSizeFixedToFrameSize(true)
     , m_didScrollTimer(this, &FrameView::didScrollTimerFired)
@@ -1614,14 +1613,6 @@ void FrameView::updateLayersAndCompositingAfterScrollIfNeeded()
 
     RefPtrWillBeRawPtr<FrameView> protect(this);
 
-    // Update sticky position objects which are stuck to the viewport.
-    for (const auto& viewportConstrainedObject : *m_viewportConstrainedObjects) {
-        LayoutObject* layoutObject = viewportConstrainedObject;
-        PaintLayer* layer = toLayoutBoxModelObject(layoutObject)->layer();
-        if (layoutObject->style()->position() == StickyPosition)
-            layer->updateLayerPosition();
-    }
-
     // If there fixed position elements, scrolling may cause compositing layers to change.
     // Update widget and layer positions after scrolling, but only if we're not inside of
     // layout.