Use CSSTokenizerInputStream::peekWithoutReplacement instead of peek().

third_party/WebKit/Source/core/css/parser/CSSTokenizerInputStream.cpp

Index: third_party/WebKit/Source/core/css/parser/CSSTokenizerInputStream.cpp
diff --git a/third_party/WebKit/Source/core/css/parser/CSSTokenizerInputStream.cpp b/third_party/WebKit/Source/core/css/parser/CSSTokenizerInputStream.cpp
index b01628426d8fad8656057df485c1120b1d203cd5..30c3185af357a086b7e77bd3ce04f5c492c72091 100644
--- a/third_party/WebKit/Source/core/css/parser/CSSTokenizerInputStream.cpp
+++ b/third_party/WebKit/Source/core/css/parser/CSSTokenizerInputStream.cpp
@@ -5,7 +5,6 @@
 #include "core/css/parser/CSSTokenizerInputStream.h"
 
 #include "core/html/parser/HTMLParserIdioms.h"
-#include "core/html/parser/InputStreamPreprocessor.h"
 #include "wtf/text/StringToNumber.h"
 
 namespace blink {
@@ -17,14 +16,6 @@ CSSTokenizerInputStream::CSSTokenizerInputStream(String input)
 {
 }
 
-UChar CSSTokenizerInputStream::peek(unsigned lookaheadOffset) const
-{
-    if ((m_offset + lookaheadOffset) >= m_stringLength)
-        return kEndOfFileMarker;
-    UChar result = (*m_string)[m_offset + lookaheadOffset];
-    return result ? result : 0xFFFD;
-}
-
 void CSSTokenizerInputStream::advanceUntilNonWhitespace()
 {
     // Using HTML space here rather than CSS space since we don't do preprocessing