Migrate WTF::Vector::append() to ::push_back() [part 6 of N]

third_party/WebKit/Source/core/fileapi/FileReaderLoader.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 359 matching lines @@
     m_stringResult = builder.toString();
     return;
   }
 
   builder.append(m_dataType);
   builder.append(";base64,");
 
   Vector<char> out;
   base64Encode(static_cast<const char*>(m_rawData->data()),
                m_rawData->byteLength(), out);
-  out.append('\0');
+  out.push_back('\0');
   builder.append(out.data());
 
   m_stringResult = builder.toString();
 }
 
 void FileReaderLoader::setEncoding(const String& encoding) {
   if (!encoding.isEmpty())
     m_encoding = WTF::TextEncoding(encoding);
 }
 
 }  // namespace blink