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

Source/modules/filesystem/DOMFileSystemBase.cpp

 /*
  * Copyright (C) 2010 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 121 matching lines @@
     return createFileSystemURL(entry->fullPath());
 }
 
 KURL DOMFileSystemBase::createFileSystemURL(const String& fullPath) const
 {
     ASSERT(DOMFilePath::isAbsolute(fullPath));
 
     if (type() == FileSystemTypeExternal) {
         // For external filesystem originString could be different from what we have in m_filesystemRootURL.
         StringBuilder result;
-        result.append("filesystem:");
+        result.appendLiteral("filesystem:");
         result.append(securityOrigin()->toString());
-        result.append("/");
+        result.append('/');
         result.append(externalPathPrefix);
         result.append(m_filesystemRootURL.path());
         // Remove the extra leading slash.
         result.append(encodeWithURLEscapeSequences(fullPath.substring(1)));
         return KURL(ParsedURLString, result.toString());
     }
 
     // For regular types we can just append the entry's fullPath to the m_filesystemRootURL that should look like 'filesystem:<origin>/<typePrefix>'.
     ASSERT(!m_filesystemRootURL.isEmpty());
     KURL url = m_filesystemRootURL;
@@ skipping 225 matching lines @@
 }
 
 bool DOMFileSystemBase::waitForAdditionalResult(int callbacksId)
 {
     if (!fileSystem())
         return false;
     return fileSystem()->waitForAdditionalResult(callbacksId);
 }
 
 } // namespace blink