Revert "Reland "UTF-8 detector for pages missing encoding info""

third_party/WebKit/Source/core/html/parser/TextResourceDecoderTest.cpp

-// Copyright 2016 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "core/html/parser/TextResourceDecoder.h"
-
-#include "testing/gtest/include/gtest/gtest.h"
-
-namespace blink {
-
-TEST(TextResourceDecoderTest, KeepEncodingConsistent)
-{
-    bool useAutoEncodingDetector = true;
-    OwnPtr<TextResourceDecoder> decoder = TextResourceDecoder::create("text/plain", WTF::TextEncoding(), useAutoEncodingDetector);
-
-    // First |decode()| call initializes the internal text codec with UTF-8
-    // which was inferred by the auto encoding detector.
-    decoder->decode("\xc2\xa7", 2);
-    ASSERT_EQ(UTF8Encoding(), decoder->encoding());
-
-    // Subsequent |decode()| is called with non-UTF-8 text (EUC-KR),
-    // but the codec remains fixed.
-    decoder->decode("\xc4\x22\xc4\x5c", 2);
-    EXPECT_EQ(UTF8Encoding(), decoder->encoding());
-
-    // |TextResourceDecoder| is created not to use auto encoding detector,
-    // which activates the light-weight UTF-8 encoding detector.
-    decoder = TextResourceDecoder::create("text/plain");
-
-    decoder->decode("abcde", 5);
-    ASSERT_EQ(Latin1Encoding(), decoder->encoding());
-
-    // Verify that the encoding(Latin1) used for the first |decode()| remains
-    // fixed even if the subsequent call is given UTF-8 text.
-    decoder->decode("\xc2\xa7", 2);
-    EXPECT_EQ(Latin1Encoding(), decoder->encoding());
-}
-}