Use StringBuilder::appendLiteral() / StringBuilder::append(char) when possible

Source/core/page/PageSerializer.cpp

 /*
  * Copyright (C) 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 119 matching lines @@
     if (parent && !shouldIgnoreElement(*parent))
         MarkupAccumulator::appendText(out, text);
 }
 
 void SerializerMarkupAccumulator::appendElement(StringBuilder& out, Element& element, Namespaces* namespaces)
 {
     if (!shouldIgnoreElement(element))
         MarkupAccumulator::appendElement(out, element, namespaces);
 
     if (isHTMLHeadElement(element)) {
-        out.append("<meta charset=\"");
+        out.appendLiteral("<meta charset=\"");
         out.append(m_document.charset());
-        out.append("\">");
+        out.appendLiteral("\">");
     }
 
     // FIXME: For object (plugins) tags and video tag we could replace them by an image of their current contents.
 }
 
 void SerializerMarkupAccumulator::appendCustomAttributes(StringBuilder& out, const Element& element, Namespaces* namespaces)
 {
     if (!element.isFrameOwnerElement())
         return;
 
@@ skipping 105 matching lines @@
 
 void PageSerializer::serializeCSSStyleSheet(CSSStyleSheet& styleSheet, const KURL& url)
 {
     StringBuilder cssText;
     for (unsigned i = 0; i < styleSheet.length(); ++i) {
         CSSRule* rule = styleSheet.item(i);
         String itemText = rule->cssText();
         if (!itemText.isEmpty()) {
             cssText.append(itemText);
             if (i < styleSheet.length() - 1)
-                cssText.append("\n\n");
+                cssText.appendLiteral("\n\n");
         }
         ASSERT(styleSheet.ownerDocument());
         Document& document = *styleSheet.ownerDocument();
         // Some rules have resources associated with them that we need to retrieve.
         if (rule->type() == CSSRule::IMPORT_RULE) {
             CSSImportRule* importRule = toCSSImportRule(rule);
             KURL importURL = document.completeURL(importRule->href());
             if (m_resourceURLs.contains(importURL))
                 continue;
             if (importRule->styleSheet())
@@ skipping 103 matching lines @@
     if (iter != m_blankFrameURLs.end())
         return iter->value;
     String url = "wyciwyg://frame/" + String::number(m_blankFrameCounter++);
     KURL fakeURL(ParsedURLString, url);
     m_blankFrameURLs.add(frame, fakeURL);
 
     return fakeURL;
 }
 
 }