Remove Backslash-as-JPY hack

Source/core/dom/Document.cpp

Index: Source/core/dom/Document.cpp
diff --git a/Source/core/dom/Document.cpp b/Source/core/dom/Document.cpp
index 9e2a20dd7a17e8edc0ca7ee1fa097074215cb6c7..55bd3b6c3af900016056e0393f799c8c182d7d0d 100644
--- a/Source/core/dom/Document.cpp
+++ b/Source/core/dom/Document.cpp
@@ -1276,9 +1276,6 @@ static inline String canonicalizedTitle(Document* document, const String& title)
 
     buffer.shrink(builderIndex + 1);
 
-    // Replace the backslashes with currency symbols if the encoding requires it.
-    document->displayBufferModifiedByEncoding(buffer.characters(), buffer.length());
-
     return String::adopt(buffer);
 }
 
@@ -2419,7 +2416,7 @@ bool Document::dispatchBeforeUnloadEvent(Chrome& chrome, Document* navigatingDoc
         return true;
     }
 
-    String text = displayStringModifiedByEncoding(beforeUnloadEvent->returnValue());
+    String text = beforeUnloadEvent->returnValue();
     if (chrome.runBeforeUnloadConfirmPanel(text, m_frame)) {
         navigatingDocument->m_didAllowNavigationViaBeforeUnloadConfirmationPanel = true;
         return true;
@@ -4750,31 +4747,6 @@ void Document::resumeScriptedAnimationControllerCallbacks()
         m_scriptedAnimationController->resume();
 }
 
-String Document::displayStringModifiedByEncoding(const String& str) const
-{
-    if (m_decoder)
-        return m_decoder->encoding().displayString(str.impl());
-    return str;
-}
-
-PassRefPtr<StringImpl> Document::displayStringModifiedByEncoding(PassRefPtr<StringImpl> str) const
-{
-    if (m_decoder)
-        return m_decoder->encoding().displayString(str);
-    return str;
-}
-
-template <typename CharacterType>
-void Document::displayBufferModifiedByEncodingInternal(CharacterType* buffer, unsigned len) const
-{
-    if (m_decoder)
-        m_decoder->encoding().displayBuffer(buffer, len);
-}
-
-// Generate definitions for both character types
-template void Document::displayBufferModifiedByEncodingInternal<LChar>(LChar*, unsigned) const;
-template void Document::displayBufferModifiedByEncodingInternal<UChar>(UChar*, unsigned) const;
-
 void Document::enqueuePageshowEvent(PageshowEventPersistence persisted)
 {
     // FIXME: https://bugs.webkit.org/show_bug.cgi?id=36334 Pageshow event needs to fire asynchronously.