Remove unused text encoding quirks.

1) Remove more Backslash-as-JPY hacks (some encodings interpret backslash as yen
sign).

The code was added in https://bugs.webkit.org/show_bug.cgi?id=49714 (r73566).

The test used to be
editing/selection/find-yensign-and-backslash-with-japanese-fonts-expected.html

The feature was removed by https://codereview.chromium.org/27030014 (r159589),
but the removal was incomplete. This CL removes the leftover code and test
expectation files (the corresponding tests were removed by r159589).

2) Remove isJapaneseEncoding from TextEncodingRegistry.cpp; it was dead
code. There used to be bool TextEncoding::isJapanese() (see r16245) which was
used by WebCore/loader/Decoder.cpp... but TextEncoding::isJapanese no longer
exists, and isJapaneseEncoding appears not to be used any more.

BUG=
R=abarth@chromium.org, jshin@chromium.org

Review URL: https://codereview.chromium.org/335803002

git-svn-id: svn://svn.chromium.org/blink/trunk@176407 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/LayoutTests/editing/selection/find-yensign-and-backslash-expected.txt

-\-in-body
-   
-Results
-
-We can find a backslash in EUC-JP page by finding a yen sign: PASS
-We can find a backslash in EUC-JP text control by finding a yen sign: PASS
-We can find a backslash in Shift_JIS page by finding a yen sign: PASS
-We can find a backslash in Shift_JIS text control by finding a yen sign: PASS
-We can find a backslash in ISO-2022-JP page by finding a yen sign: PASS
-We can find a backslash in ISO-2022-JP text control by finding a yen sign: PASS
-We can NOT find a backslash in UTF8 page by finding a yen sign: PASS
-We can NOT find a backslash in UTF8 text control by finding a yen sign: PASS
-

third_party/WebKit/LayoutTests/editing/selection/find-yensign-and-backslash-with-japanese-fonts-expected.txt

-No specified font + yen sign: PASS
-No specified font + backslash: PASS
-MS PGothic + yen sign: PASS
-MS PGothic + backslash: PASS
-MS Gothic + yen sign: PASS
-MS Gothic + backslash: PASS
-MS PMincho + yen sign: PASS
-MS PMincho + backslash: PASS
-MS Mincho + yen sign: PASS
-MS Mincho + backslash: PASS
-Meiryo + yen sign: PASS
-Meiryo + backslash: PASS
-ＭＳ Ｐゴシック + yen sign: PASS
-ＭＳ Ｐゴシック + backslash: PASS
-ＭＳ ゴシック + yen sign: PASS
-ＭＳ ゴシック + backslash: PASS
-ＭＳ Ｐ明朝 + yen sign: PASS
-ＭＳ Ｐ明朝 + backslash: PASS
-ＭＳ 明朝 + yen sign: PASS
-ＭＳ 明朝 + backslash: PASS
-メイリオ + yen sign: PASS
-メイリオ + backslash: PASS
-Times + yen sign: PASS
-Times + backslash: PASS
-foobar + yen sign: PASS
-foobar + backslash: PASS
-

third_party/WebKit/Source/wtf/text/TextEncoding.cpp

@@ -45,7 +45,6 @@ static const TextEncoding& UTF7Encoding()
 
 TextEncoding::TextEncoding(const char* name)
     : m_name(atomicCanonicalTextEncodingName(name))
-    , m_backslashAsCurrencySymbol(backslashAsCurrencySymbol())
 {
     // Aliases are valid, but not "replacement" itself.
     if (m_name && isReplacementEncoding(name))
@@ -54,7 +53,6 @@ TextEncoding::TextEncoding(const char* name)
 
 TextEncoding::TextEncoding(const String& name)
     : m_name(atomicCanonicalTextEncodingName(name))
-    , m_backslashAsCurrencySymbol(backslashAsCurrencySymbol())
 {
     // Aliases are valid, but not "replacement" itself.
     if (m_name && isReplacementEncoding(name))
@@ -134,11 +132,6 @@ bool TextEncoding::usesVisualOrdering() const
     return m_name == a;
 }
 
-UChar TextEncoding::backslashAsCurrencySymbol() const
-{
-    return shouldShowBackslashAsCurrencySymbolIn(m_name) ? 0x00A5 : '\\';
-}
-
 bool TextEncoding::isNonByteBasedEncoding() const
 {
     if (noExtendedTextEncodingNameUsed()) {

third_party/WebKit/Source/wtf/text/TextEncoding.h

@@ -58,14 +58,11 @@ public:
     // Applies Unicode NFC normalization, then encodes the normalized string.
     CString normalizeAndEncode(const String&, UnencodableHandling) const;
 
-    UChar backslashAsCurrencySymbol() const;
-
 private:
     bool isNonByteBasedEncoding() const;
     bool isUTF7Encoding() const;
 
     const char* m_name;
-    UChar m_backslashAsCurrencySymbol;
 };
 
 inline bool operator==(const TextEncoding& a, const TextEncoding& b) { return a.name() == b.name(); }

third_party/WebKit/Source/wtf/text/TextEncodingRegistry.cpp

@@ -116,8 +116,6 @@ static Mutex& encodingRegistryMutex()
 static TextEncodingNameMap* textEncodingNameMap;
 static TextCodecMap* textCodecMap;
 static bool didExtendTextCodecMaps;
-static HashSet<const char*>* japaneseEncodings;
-static HashSet<const char*>* nonBackslashEncodings;
 
 static const char textEncodingNameBlacklist[][6] = { "UTF-7" };
 
@@ -221,54 +219,6 @@ static void buildBaseTextCodecMaps()
     TextCodecUserDefined::registerCodecs(addToTextCodecMap);
 }
 
-static void addEncodingName(HashSet<const char*>* set, const char* name)
-{
-    // We must not use atomicCanonicalTextEncodingName() because this function is called in it.
-    const char* atomicName = textEncodingNameMap->get(name);
-    if (atomicName)
-        set->add(atomicName);
-}
-
-static void buildQuirksSets()
-{
-    // FIXME: Having isJapaneseEncoding() and shouldShowBackslashAsCurrencySymbolIn()
-    // and initializing the sets for them in TextEncodingRegistry.cpp look strange.
-
-    ASSERT(!japaneseEncodings);
-    ASSERT(!nonBackslashEncodings);
-
-    japaneseEncodings = new HashSet<const char*>;
-    addEncodingName(japaneseEncodings, "EUC-JP");
-    addEncodingName(japaneseEncodings, "ISO-2022-JP");
-    addEncodingName(japaneseEncodings, "ISO-2022-JP-1");
-    addEncodingName(japaneseEncodings, "ISO-2022-JP-2");
-    addEncodingName(japaneseEncodings, "ISO-2022-JP-3");
-    addEncodingName(japaneseEncodings, "JIS_C6226-1978");
-    addEncodingName(japaneseEncodings, "JIS_X0201");
-    addEncodingName(japaneseEncodings, "JIS_X0208-1983");
-    addEncodingName(japaneseEncodings, "JIS_X0208-1990");
-    addEncodingName(japaneseEncodings, "JIS_X0212-1990");
-    addEncodingName(japaneseEncodings, "Shift_JIS");
-    addEncodingName(japaneseEncodings, "Shift_JIS_X0213-2000");
-    addEncodingName(japaneseEncodings, "cp932");
-    addEncodingName(japaneseEncodings, "x-mac-japanese");
-
-    nonBackslashEncodings = new HashSet<const char*>;
-    // The text encodings below treat backslash as a currency symbol for IE compatibility.
-    // See http://blogs.msdn.com/michkap/archive/2005/09/17/469941.aspx for more information.
-    addEncodingName(nonBackslashEncodings, "x-mac-japanese");
-    addEncodingName(nonBackslashEncodings, "ISO-2022-JP");
-    addEncodingName(nonBackslashEncodings, "EUC-JP");
-    // Shift_JIS_X0213-2000 is not the same encoding as Shift_JIS on Mac. We need to register both of them.
-    addEncodingName(nonBackslashEncodings, "Shift_JIS");
-    addEncodingName(nonBackslashEncodings, "Shift_JIS_X0213-2000");
-}
-
-bool isJapaneseEncoding(const char* canonicalEncodingName)
-{
-    return canonicalEncodingName && japaneseEncodings && japaneseEncodings->contains(canonicalEncodingName);
-}
-
 bool isReplacementEncoding(const char* alias)
 {
     return alias && !strcasecmp(alias, "replacement");
@@ -279,11 +229,6 @@ bool isReplacementEncoding(const String& alias)
     return alias == "replacement";
 }
 
-bool shouldShowBackslashAsCurrencySymbolIn(const char* canonicalEncodingName)
-{
-    return canonicalEncodingName && nonBackslashEncodings && nonBackslashEncodings->contains(canonicalEncodingName);
-}
-
 static void extendTextCodecMaps()
 {
     TextCodecReplacement::registerEncodingNames(addToTextEncodingNameMap);
@@ -293,7 +238,6 @@ static void extendTextCodecMaps()
     TextCodecICU::registerCodecs(addToTextCodecMap);
 
     pruneBlacklistedCodecs();
-    buildQuirksSets();
 }
 
 PassOwnPtr<TextCodec> newTextCodec(const TextEncoding& encoding)

third_party/WebKit/Source/wtf/text/TextEncodingRegistry.h

@@ -46,8 +46,6 @@ template <typename CharacterType>
 const char* atomicCanonicalTextEncodingName(const CharacterType*, size_t);
 const char* atomicCanonicalTextEncodingName(const String&);
 bool noExtendedTextEncodingNameUsed();
-bool isJapaneseEncoding(const char* canonicalEncodingName);
-bool shouldShowBackslashAsCurrencySymbolIn(const char* canonicalEncodingName);
 bool isReplacementEncoding(const char* alias);
 bool isReplacementEncoding(const String& alias);
 
@@ -60,8 +58,6 @@ void dumpTextEncodingNameMap();
 using WTF::newTextCodec;
 using WTF::atomicCanonicalTextEncodingName;
 using WTF::noExtendedTextEncodingNameUsed;
-using WTF::isJapaneseEncoding;
-using WTF::shouldShowBackslashAsCurrencySymbolIn;
 #ifndef NDEBUG
 using WTF::dumpTextEncodingNameMap;
 #endif