Define a variable to distinguish system_icu from bundled_icu

Most of encoding name aliases manually added in TextCodecICU are present in Chrome's copy of ICU. So, they don't have to be added when Chrome's ICU is used.

Define 'USING_SYSTEM_ICU" when 'use_system_icu=1' and register the above encoding name aliases only when 'USING_SYSTEM_ICU' is set.

In addition, the following was done :

* Remove GBK aliases not specified in the encoding spec.
* Add tests for GBK and EUC-KR aliases in the spec that have
  not been tested before.
* Add two aliases for ISO-8859-8-I regardless of whether bundled or system
  ICU is used.
* Remove xA3xA0 => U+3000 override in GBK and GB18030 because
  Chrome's copy of ICU already has that with
    https://codereview.chromium.org/1162723008/
* Remove gbkFallback for 4 code points when bundled ICU is used for the same
  reason as above.
* Remove one-way mapping from Unicode for U+22EF and U+301C
  even with system_icu because Chinese IMEs on Mac do not produce them on Mac.  (they're added to Webkit to be compatible with an old Mac converter, but they're not specified in the encoding spec.)

BUG=493824
TEST=Layout test fast/encoding/*

Review URL: https://codereview.chromium.org/1167523003

git-svn-id: svn://svn.chromium.org/blink/trunk@196607 bbb929c8-8fbe-4397-9dbb-9b2b20218538

1 files changed, 4 insertions, 0 deletions

diff --git a/third_party/WebKit/Source/wtf/unicode/CharacterNames.h b/third_party/WebKit/Source/wtf/unicode/CharacterNames.h
index aad3391..3eae9b6 100644
--- a/third_party/WebKit/Source/wtf/unicode/CharacterNames.h
+++ b/third_party/WebKit/Source/wtf/unicode/CharacterNames.h
@@ -60,7 +60,9 @@ const UChar hyphenCharacter = 0x2010;
 const UChar hyphenMinusCharacter = 0x002D;
 const UChar ideographicCommaCharacter = 0x3001;
 const UChar ideographicFullStopCharacter = 0x3002;
+#if defined(USING_SYSTEM_ICU)
 const UChar ideographicSpaceCharacter = 0x3000;
+#endif
 const UChar inhibitArabicFormShapingCharacter = 0x206C;
 const UChar inhibitSymmetricSwappingCharacter = 0x206A;
 const UChar latinCapitalLetterIWithDotAbove = 0x0130;
@@ -132,7 +134,9 @@ using WTF::Unicode::hyphenCharacter;
 using WTF::Unicode::hyphenMinusCharacter;
 using WTF::Unicode::ideographicCommaCharacter;
 using WTF::Unicode::ideographicFullStopCharacter;
+#if defined(USING_SYSTEM_ICU)
 using WTF::Unicode::ideographicSpaceCharacter;
+#endif
 using WTF::Unicode::inhibitArabicFormShapingCharacter;
 using WTF::Unicode::inhibitSymmetricSwappingCharacter;
 using WTF::Unicode::latinCapitalLetterIWithDotAbove;