Remove Backslash-as-JPY hack

Source/wtf/text/TextCodecICU.cpp

 /*
  * Copyright (C) 2004, 2006, 2007, 2008, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Alexey Proskuryakov <ap@nypop.com>
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 406 matching lines @@
         return;
     }
     UCNV_FROM_U_CALLBACK_SUBSTITUTE(context, fromUArgs, codeUnits, length, codePoint, reason, err);
 }
 
 class TextCodecInput {
 public:
     TextCodecInput(const TextEncoding& encoding, const UChar* characters, size_t length)
         : m_begin(characters)
         , m_end(characters + length)
-    {
-        if (encoding.hasTrivialDisplayString())
-            return;
-        m_buffer.reserveInitialCapacity(length);
-        m_buffer.append(characters, length);
-        initalizeFromBuffer(encoding);
-    }
+    { }
 
     TextCodecInput(const TextEncoding& encoding, const LChar* characters, size_t length)
     {
         m_buffer.reserveInitialCapacity(length);
         for (size_t i = 0; i < length; ++i)
             m_buffer.append(characters[i]);
-        initalizeFromBuffer(encoding);
+        m_begin = m_buffer.data();
+        m_end = m_begin + m_buffer.size();
     }
 
     const UChar* begin() const { return m_begin; }
     const UChar* end() const { return m_end; }
 
 private:
-    void initalizeFromBuffer(const TextEncoding& encoding)
-    {
-        // FIXME: We should see if there is "force ASCII range" mode in ICU;
-        // until then, we change the backslash into a yen sign.
-        // Encoding will change the yen sign back into a backslash.
-        encoding.displayBuffer(m_buffer.data(), m_buffer.size());
-        m_begin = m_buffer.data();
-        m_end = m_begin + m_buffer.size();
-    }
-
     const UChar* m_begin;
     const UChar* m_end;
     Vector<UChar> m_buffer;
 };
 
 CString TextCodecICU::encodeInternal(const TextCodecInput& input, UnencodableHandling handling)
 {
     const UChar* source = input.begin();
     const UChar* end = input.end();
 
@@ skipping 52 matching lines @@
 {
     return encodeCommon(characters, length, handling);
 }
 
 CString TextCodecICU::encode(const LChar* characters, size_t length, UnencodableHandling handling)
 {
     return encodeCommon(characters, length, handling);
 }
 
 } // namespace WTF