Change the linebreak behavior of minlength and maxlength attributes of TEXTAREA.

third_party/WebKit/Source/core/html/HTMLTextAreaElementTest.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/HTMLTextAreaElement.h"
 
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace blink {
 
 TEST(HTMLTextAreaElementTest, SanitizeUserInputValue)
 {
     UChar kLeadSurrogate = 0xD800;
     EXPECT_EQ("", HTMLTextAreaElement::sanitizeUserInputValue("", 0));
     EXPECT_EQ("", HTMLTextAreaElement::sanitizeUserInputValue("a", 0));
     EXPECT_EQ("", HTMLTextAreaElement::sanitizeUserInputValue("\n", 0));
     StringBuilder builder;
     builder.append(kLeadSurrogate);
     String leadSurrogate = builder.toString();
     EXPECT_EQ("", HTMLTextAreaElement::sanitizeUserInputValue(leadSurrogate, 0));
 
     EXPECT_EQ("", HTMLTextAreaElement::sanitizeUserInputValue("", 1));
     EXPECT_EQ("", HTMLTextAreaElement::sanitizeUserInputValue(leadSurrogate, 1));
     EXPECT_EQ("a", HTMLTextAreaElement::sanitizeUserInputValue("a", 1));
-    EXPECT_EQ("", HTMLTextAreaElement::sanitizeUserInputValue("\n", 1));
+    EXPECT_EQ("\n", HTMLTextAreaElement::sanitizeUserInputValue("\n", 1));
     EXPECT_EQ("\n", HTMLTextAreaElement::sanitizeUserInputValue("\n", 2));
 
     EXPECT_EQ("abc", HTMLTextAreaElement::sanitizeUserInputValue(String("abc") + leadSurrogate, 4));
-    EXPECT_EQ("a\nc", HTMLTextAreaElement::sanitizeUserInputValue("a\ncdef", 4));
+    EXPECT_EQ("a\ncd", HTMLTextAreaElement::sanitizeUserInputValue("a\ncdef", 4));
+    EXPECT_EQ("a\rcd", HTMLTextAreaElement::sanitizeUserInputValue("a\rcdef", 4));
+    EXPECT_EQ("a\r\ncd", HTMLTextAreaElement::sanitizeUserInputValue("a\r\ncdef", 4));
 }
 
 } // namespace blink