Replace WTF::emptyString{16Bit}() with a static global

third_party/WebKit/Source/platform/SharedBufferChunkReader.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 100 matching lines @@
 }
 
 String SharedBufferChunkReader::nextChunkAsUTF8StringWithLatin1Fallback(
     bool includeSeparator) {
   Vector<char> data;
   if (!nextChunk(data, includeSeparator))
     return String();
 
   return data.size()
              ? String::fromUTF8WithLatin1Fallback(data.data(), data.size())
-             : emptyString();
+             : emptyString;
 }
 
 size_t SharedBufferChunkReader::peek(Vector<char>& data, size_t requestedSize) {
   data.clear();
   if (requestedSize <= m_segmentLength - m_segmentIndex) {
     data.append(m_segment + m_segmentIndex, requestedSize);
     return requestedSize;
   }
 
   size_t readBytesCount = m_segmentLength - m_segmentIndex;
   data.append(m_segment + m_segmentIndex, readBytesCount);
 
   size_t bufferPosition = m_bufferPosition + m_segmentLength;
   const char* segment = 0;
   while (size_t segmentLength =
              m_buffer->getSomeData(segment, bufferPosition)) {
     if (requestedSize <= readBytesCount + segmentLength) {
       data.append(segment, requestedSize - readBytesCount);
       readBytesCount += (requestedSize - readBytesCount);
       break;
     }
     data.append(segment, segmentLength);
     readBytesCount += segmentLength;
     bufferPosition += segmentLength;
   }
   return readBytesCount;
 }
 
 }  // namespace blink