Disable scroll anchoring when in printing mode

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

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999 Lars Knoll <knoll@kde.org>
  *                     1999 Antti Koivisto <koivisto@kde.org>
  *                     2000 Dirk Mueller <mueller@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  *           (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
@@ skipping 169 matching lines @@
       m_scrollbarsSuppressed(false),
       m_inUpdateScrollbars(false),
       m_frameTimingRequestsDirty(true),
       m_viewportIntersectionValid(false),
       m_hiddenForThrottling(false),
       m_crossOriginForThrottling(false),
       m_subtreeThrottled(false),
       m_currentUpdateLifecyclePhasesTargetState(
           DocumentLifecycle::Uninitialized),
       m_scrollAnchor(this),
+      m_disableScrollAnchoringForPrinting(false),
       m_needsScrollbarsUpdate(false),
       m_suppressAdjustViewSize(false),
       m_allowsLayoutInvalidationAfterLayoutClean(true) {
   ASSERT(m_frame);
   init();
 }
 
 FrameView* FrameView::create(LocalFrame* frame) {
   FrameView* view = new FrameView(frame);
   view->show();
@@ skipping 646 matching lines @@
   lifecycle().advanceTo(DocumentLifecycle::StyleClean);
 
   if (shouldPerformScrollAnchoring())
     m_scrollAnchor.save();
 }
 
 bool FrameView::shouldPerformScrollAnchoring() const {
   return RuntimeEnabledFeatures::scrollAnchoringEnabled() &&
          !RuntimeEnabledFeatures::rootLayerScrollingEnabled() &&
          m_scrollAnchor.hasScroller() &&
-         layoutBox()->style()->overflowAnchor() != AnchorNone;
+         layoutBox()->style()->overflowAnchor() != AnchorNone &&
+         !m_disableScrollAnchoringForPrinting;
 }
 
 static inline void layoutFromRootObject(LayoutObject& root) {
   LayoutState layoutState(root);
   root.layout();
 }
 
 void FrameView::prepareLayoutAnalyzer() {
   bool isTracing = false;
   TRACE_EVENT_CATEGORY_GROUP_ENABLED(
@@ skipping 3606 matching lines @@
 }
 
 bool FrameView::canThrottleRendering() const {
   if (!RuntimeEnabledFeatures::renderingPipelineThrottlingEnabled())
     return false;
   return m_subtreeThrottled ||
          (m_hiddenForThrottling && m_crossOriginForThrottling);
 }
 
 }  // namespace blink