Prune CreateVisiblePositionDeprecated from adjustedSelectionStartForStyleComputation

third_party/WebKit/Source/core/editing/EditingStyle.cpp

 /*
  * Copyright (C) 2007, 2008, 2009 Apple Computer, Inc.
  * Copyright (C) 2010, 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 1317 matching lines @@
         return 0;
     return legacyFontSizeFromCSSValue(document, toCSSPrimitiveValue(cssValue),
         m_isMonospaceFont, AlwaysUseLegacyFontSize);
 }
 
 EditingStyle* EditingStyle::styleAtSelectionStart(const VisibleSelection& selection, bool shouldUseBackgroundColorInEffect, MutableStylePropertySet* styleToCheck)
 {
     if (selection.isNone())
         return nullptr;
 
+    Document& document = *selection.start().document();
+
+    // TODO(xiaochengh): The use of updateStyleAndLayoutIgnorePendingStylesheets
+    // needs to be audited. see http://crbug.com/590369 for more details.
+    document.updateStyleAndLayoutIgnorePendingStylesheets();
+
+    DocumentLifecycle::DisallowTransitionScope disallowTransition(document.lifecycle());
+
     Position position = adjustedSelectionStartForStyleComputation(selection);
 
     // If the pos is at the end of a text node, then this node is not fully selected.
     // Move it to the next deep equivalent position to avoid removing the style from this node.
     // e.g. if pos was at Position("hello", 5) in <b>hello<div>world</div></b>, we want Position("world", 0) instead.
     // We only do this for range because caret at Position("hello", 5) in <b>hello</b>world should give you font-weight: bold.
     Node* positionNode = position.computeContainerNode();
     if (selection.isRange() && positionNode && positionNode->isTextNode() && position.computeOffsetInContainerNode() == positionNode->maxCharacterOffset())
         position = nextVisuallyDistinctCandidate(position);
 
@@ skipping 409 matching lines @@
 {
     for (Node* ancestor = node; ancestor; ancestor = ancestor->parentNode()) {
         CSSComputedStyleDeclaration* ancestorStyle = CSSComputedStyleDeclaration::create(ancestor);
         if (!hasTransparentBackgroundColor(ancestorStyle))
             return ancestorStyle->getPropertyCSSValue(CSSPropertyBackgroundColor);
     }
     return nullptr;
 }
 
 } // namespace blink