Support display: contents for elements, first-line and first-letter pseudos.

third_party/WebKit/Source/core/css/resolver/StyleResolverState.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc.
  * All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 16 matching lines @@
 #include "core/dom/Node.h"
 #include "core/dom/NodeComputedStyle.h"
 #include "core/frame/FrameHost.h"
 #include "core/layout/api/LayoutViewItem.h"
 
 namespace blink {
 
 StyleResolverState::StyleResolverState(
     Document& document,
     const ElementResolveContext& elementContext,
-    const ComputedStyle* parentStyle)
+    const ComputedStyle* parentStyle,
+    const ComputedStyle* layoutParentStyle)
     : m_elementContext(elementContext),
       m_document(document),
       m_style(nullptr),
       // TODO(jchaffraix): We should make m_parentStyle const
       // (https://crbug.com/468152)
       m_parentStyle(const_cast<ComputedStyle*>(parentStyle)),
+      m_layoutParentStyle(layoutParentStyle),
       m_isAnimationInterpolationMapReady(false),
       m_isAnimatingCustomProperties(false),
       m_applyPropertyToRegularStyle(true),
       m_applyPropertyToVisitedLinkStyle(false),
       m_hasDirAutoAttribute(false),
       m_fontBuilder(document),
       m_elementStyleResources(document, document.devicePixelRatio()) {
+  DCHECK(!!m_parentStyle == !!m_layoutParentStyle);
+
   if (!m_parentStyle) {
     // TODO(jchaffraix): We should make m_parentStyle const
     // (https://crbug.com/468152)
     m_parentStyle = const_cast<ComputedStyle*>(m_elementContext.parentStyle());
   }
 
+  if (!m_layoutParentStyle)
+    m_layoutParentStyle = m_elementContext.layoutParentStyle();
+
+  if (!m_layoutParentStyle)
+    m_layoutParentStyle = m_parentStyle;
+
   DCHECK(document.isActive());
 }
 
 StyleResolverState::StyleResolverState(Document& document,
                                        Element* element,
-                                       const ComputedStyle* parentStyle)
+                                       const ComputedStyle* parentStyle,
+                                       const ComputedStyle* layoutParentStyle)
     : StyleResolverState(document,
                          element ? ElementResolveContext(*element)
                                  : ElementResolveContext(document),
-                         parentStyle) {}
+                         parentStyle,
+                         layoutParentStyle) {}
 
 StyleResolverState::~StyleResolverState() {
   // For performance reasons, explicitly clear HeapVectors and
   // HeapHashMaps to avoid giving a pressure on Oilpan's GC.
   m_animationUpdate.clear();
 }
 
 void StyleResolverState::setStyle(PassRefPtr<ComputedStyle> style) {
   // FIXME: Improve RAII of StyleResolverState to remove this function.
   m_style = style;
@@ skipping 34 matching lines @@
   HeapHashMap<CSSPropertyID, Member<const CSSValue>>* map =
       m_parsedPropertiesForPendingSubstitutionCache.get(&value);
   if (!map) {
     map = new HeapHashMap<CSSPropertyID, Member<const CSSValue>>;
     m_parsedPropertiesForPendingSubstitutionCache.set(&value, map);
   }
   return *map;
 }
 
 }  // namespace blink