Bug 926580 - Kill unused layout.enable_japanese_specific_transform pref. r=roc

layout/base/nsPresContext.cpp

@@ -741,10 +741,6 @@ nsPresContext::GetUserPreferences()
   mUseDocumentFonts =
     Preferences::GetInt("browser.display.use_document_fonts") != 0;
 
-  // * replace backslashes with Yen signs? (bug 245770)
-  mEnableJapaneseTransform =
-    Preferences::GetBool("layout.enable_japanese_specific_transform");
-
   mPrefScrollbarSide = Preferences::GetInt("layout.scrollbar.side");
 
   ResetCachedFontPrefs();

layout/base/nsPresContext.h

@@ -1247,7 +1247,6 @@ protected:
   unsigned              mPaginated : 1;
   unsigned              mCanPaginatedScroll : 1;
   unsigned              mDoScaledTwips : 1;
-  unsigned              mEnableJapaneseTransform : 1;
   unsigned              mIsRootPaginatedDocument : 1;
   unsigned              mPrefBidiDirection : 1;
   unsigned              mPrefScrollbarSide : 2;

layout/generic/nsTextFrameUtils.cpp

@@ -12,14 +12,6 @@
 #include "nsTextFragment.h"
 #include <algorithm>
 
-// XXX TODO implement transform of backslash to yen that nsTextTransform does
-// when requested by PresContext->LanguageSpecificTransformType(). Do it with
-// a new factory type that just munges the input stream. But first, check
-// that we really still need this, it's only enabled via a hidden pref
-// which defaults false...
-
-#define UNICODE_ZWSP 0x200B
-  
 static bool IsDiscardable(PRUnichar ch, uint32_t* aFlags)
 {
   // Unlike IS_DISCARDABLE, we don't discard \r. \r will be ignored by gfxTextRun

modules/libpref/src/init/all.js

@@ -1810,11 +1810,6 @@ pref("layout.word_select.stop_at_punctuation", true);
 // Windows default is 1 for word delete behavior, the rest as for 2.
 pref("layout.selection.caret_style", 0);
 
-// pref to control whether or not to replace backslashes with Yen signs
-// in documents encoded in one of Japanese legacy encodings (EUC-JP, 
-// Shift_JIS, ISO-2022-JP)
-pref("layout.enable_japanese_specific_transform", false);
-
 // pref to force frames to be resizable
 pref("layout.frames.force_resizability", false);