Remove dedicated TextCodecUTF16

third_party/WebKit/LayoutTests/fast/encoding/char-decoding-truncated.html

Index: third_party/WebKit/LayoutTests/fast/encoding/char-decoding-truncated.html
diff --git a/third_party/WebKit/LayoutTests/fast/encoding/char-decoding-truncated.html b/third_party/WebKit/LayoutTests/fast/encoding/char-decoding-truncated.html
index eeb755153e00915e3f7e25e443baa203c8a60c4c..2f398a27c66369021eac1e423f9261baeb86a830 100644
--- a/third_party/WebKit/LayoutTests/fast/encoding/char-decoding-truncated.html
+++ b/third_party/WebKit/LayoutTests/fast/encoding/char-decoding-truncated.html
@@ -10,15 +10,15 @@ testDecode('utf-8', '%E2%88%9A', 'U+221A');
 testDecode('utf-8', '%E2%88', 'U+FFFD/U+FFFD');
 testDecode('utf-8', '%E2', 'U+FFFD');
 
-// UTF-16 codec does not emit replacement characters
+// UTF-16 codec emits replacement characters
 testDecode('utf-16', '%69%D8%D6%DE', 'U+D869/U+DED6');
-testDecode('utf-16', '%69%D8%D6', 'U+D869');
-testDecode('utf-16', '%69%D8', 'U+D869');
-testDecode('utf-16', '%69', '');
+testDecode('utf-16', '%69%D8%D6', 'U+FFFD');
+testDecode('utf-16', '%69%D8', 'U+FFFD');
+testDecode('utf-16', '%69', 'U+FFFD');
 testDecode('utf-16be', '%D8%69%DE%D6', 'U+D869/U+DED6');
-testDecode('utf-16be', '%D8%69%DE', 'U+D869');
-testDecode('utf-16be', '%D8%69', 'U+D869');
-testDecode('utf-16be', '%D8', '');
+testDecode('utf-16be', '%D8%69%DE', 'U+FFFD');
+testDecode('utf-16be', '%D8%69', 'U+FFFD');
+testDecode('utf-16be', '%D8', 'U+FFFD');
 
 // Other codecs emit replacement characters
 testDecode('gb2312', '%A3%A0', 'U+3000');