Minimize RenderObject* casting to RenderText*

Source/core/dom/Text.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 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 106 matching lines @@
     setDataWithoutUpdate(oldStr.substring(0, offset));
 
     didModifyData(oldStr);
 
     if (parentNode())
         parentNode()->insertBefore(newText.get(), nextSibling(), exceptionState);
     if (exceptionState.hadException())
         return nullptr;
 
     if (renderer())
-        toRenderText(renderer())->setTextWithOffset(dataImpl(), 0, oldStr.length());
+        renderer()->setTextWithOffset(dataImpl(), 0, oldStr.length());
 
     if (parentNode())
         document().didSplitTextNode(*this);
 
     return newText.release();
 }
 
 static const Text* earliestLogicallyAdjacentTextNode(const Text* t)
 {
     for (const Node* n = t->previousSibling(); n; n = n->previousSibling()) {
@@ skipping 165 matching lines @@
 }
 
 void Text::attach(const AttachContext& context)
 {
     RenderTreeBuilder(this, context.resolvedStyle).createRendererForTextIfNeeded();
     CharacterData::attach(context);
 }
 
 void Text::recalcTextStyle(StyleRecalcChange change, Text* nextTextSibling)
 {
-    if (RenderText* renderer = toRenderText(this->renderer())) {
+    if (RenderText* renderer = this->renderer()) {
         if (change != NoChange || needsStyleRecalc())
             renderer->setStyle(document().ensureStyleResolver().styleForText(this));
         if (needsStyleRecalc())
             renderer->setText(dataImpl());
         clearNeedsStyleRecalc();
     } else if (needsStyleRecalc() || needsWhitespaceRenderer()) {
         reattach();
         reattachWhitespaceSiblings(nextTextSibling);
     }
 }
 
 // If a whitespace node had no renderer and goes through a recalcStyle it may
 // need to create one if the parent style now has white-space: pre.
 bool Text::needsWhitespaceRenderer()
 {
     ASSERT(!renderer());
     if (RenderStyle* style = parentRenderStyle())
         return style->preserveNewline();
     return false;
 }
 
 void Text::updateTextRenderer(unsigned offsetOfReplacedData, unsigned lengthOfReplacedData, RecalcStyleBehavior recalcStyleBehavior)
 {
     if (!inActiveDocument())
         return;
-    RenderText* textRenderer = toRenderText(renderer());
+    RenderText* textRenderer = renderer();
     if (!textRenderer || !textRendererIsNeeded(*textRenderer->style(), *textRenderer->parent())) {
         lazyReattachIfAttached();
         // FIXME: Editing should be updated so this is not neccesary.
         if (recalcStyleBehavior == DeprecatedRecalcStyleImmediatlelyForEditing)
             document().updateRenderTreeIfNeeded();
         return;
     }
     textRenderer->setTextWithOffset(dataImpl(), offsetOfReplacedData, lengthOfReplacedData);
 }
 
@@ skipping 16 matching lines @@
             result.appendLiteral("; ");
         result.appendLiteral("value=");
         result.append(s);
     }
 
     strncpy(buffer, result.toString().utf8().data(), length - 1);
 }
 #endif
 
 } // namespace blink