Fix graphics layer backing and offset for composited selection handles.

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  *           (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2011 Apple Inc.
  *               All rights reserved.
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved.
  *               (http://www.torchmobile.com/)
@@ skipping 2297 matching lines @@
 
 TransformationMatrix LayoutObject::localToAncestorTransform(
     const LayoutBoxModelObject* ancestor,
     MapCoordinatesFlags mode) const {
   TransformState transformState(TransformState::ApplyTransformDirection);
   mapLocalToAncestor(ancestor, transformState,
                      mode | ApplyContainerFlip | UseTransforms);
   return transformState.accumulatedTransform();
 }
 
-FloatPoint LayoutObject::localToInvalidationBackingPoint(
-    const LayoutPoint& localPoint,
-    PaintLayer** backingLayer) {
-  const LayoutBoxModelObject& paintInvalidationContainer =
-      containerForPaintInvalidation();
-  DCHECK(paintInvalidationContainer.layer());
-
-  if (backingLayer)
-    *backingLayer = paintInvalidationContainer.layer();
-  FloatPoint containerPoint =
-      localToAncestorPoint(FloatPoint(localPoint), &paintInvalidationContainer,
-                           TraverseDocumentBoundaries);
-
-  // A layoutObject can have no invalidation backing if it is from a detached
-  // frame, or when forced compositing is disabled.
-  if (paintInvalidationContainer.layer()->compositingState() == NotComposited)
-    return containerPoint;
-
-  PaintLayer::mapPointInPaintInvalidationContainerToBacking(
-      paintInvalidationContainer, containerPoint);
-
-  if (GraphicsLayer* backingLayer =
-          paintInvalidationContainer.layer()->graphicsLayerBacking(this)) {
-    containerPoint.move(-backingLayer->offsetFromLayoutObject());
-  }
-
-  return containerPoint;
-}
-
 LayoutSize LayoutObject::offsetFromContainer(const LayoutObject* o) const {
   ASSERT(o == container());
   return o->hasOverflowClip()
              ? LayoutSize(-toLayoutBox(o)->scrolledContentOffset())
              : LayoutSize();
 }
 
 LayoutSize LayoutObject::offsetFromAncestorContainer(
     const LayoutObject* ancestorContainer) const {
   if (ancestorContainer == this)
@@ skipping 1180 matching lines @@
     const blink::LayoutObject* root = object1;
     while (root->parent())
       root = root->parent();
     root->showLayoutTreeAndMark(object1, "*", object2, "-", 0);
   } else {
     WTFLogAlways("%s", "Cannot showLayoutTree. Root is (nil)");
   }
 }
 
 #endif