Update documentation and cleanup impls for localToSVGParentTransform()

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 3262 matching lines @@
   NOTREACHED();
   return FloatRect();
 }
 
 FloatRect LayoutObject::visualRectInLocalSVGCoordinates() const {
   NOTREACHED();
   return FloatRect();
 }
 
 AffineTransform LayoutObject::localSVGTransform() const {
-  static const AffineTransform identity;
-  return identity;
-}
-
-const AffineTransform& LayoutObject::localToSVGParentTransform() const {
-  static const AffineTransform identity;
-  return identity;
+  return AffineTransform();
 }
 
 bool LayoutObject::nodeAtFloatPoint(HitTestResult&,
                                     const FloatPoint&,
                                     HitTestAction) {
   ASSERT_NOT_REACHED();
   return false;
 }
 
 bool LayoutObject::isRelayoutBoundaryForInspector() const {
@@ skipping 179 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