NOT FOR LANDING: Hack up CSSParser for speed.

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

 // Copyright 2014 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/css/parser/CSSTokenizerInputStream.h"
 
 #include "core/css/parser/CSSParserString.h"
 #include "core/html/parser/InputStreamPreprocessor.h"
 
 namespace blink {
 
-CSSTokenizerInputStream::CSSTokenizerInputStream(String input)
-    : m_offset(0)
-    , m_stringLength(input.length())
-    , m_string(input.impl())
+double CSSTokenizerInputStream::getDouble(unsigned start, unsigned end) const
 {
-}
-
-UChar CSSTokenizerInputStream::peek(unsigned lookaheadOffset)
-{
-    if ((m_offset + lookaheadOffset) >= m_stringLength)
-        return kEndOfFileMarker;
-    UChar result = (*m_string)[m_offset + lookaheadOffset];
-    return result ? result : 0xFFFD;
-}
-
-void CSSTokenizerInputStream::pushBack(UChar cc)
-{
-    --m_offset;
-    ASSERT(nextInputChar() == cc);
-}
-
-double CSSTokenizerInputStream::getDouble(unsigned start, unsigned end)
-{
-    ASSERT(start <= end && ((m_offset + end) <= m_stringLength));
+    ASSERT(start <= end && ((m_offset + end) <= length()));
     bool isResultOK = false;
     double result = 0.0;
     if (start < end) {
         if (m_string->is8Bit())
             result = charactersToDouble(m_string->characters8() + m_offset + start, end - start, &isResultOK);
         else
             result = charactersToDouble(m_string->characters16() + m_offset + start, end - start, &isResultOK);
     }
     // FIXME: It looks like callers ensure we have a valid number
     return isResultOK ? result : 0.0;
 }
 
 CSSParserString CSSTokenizerInputStream::rangeAsCSSParserString(unsigned start, unsigned length) const
 {
-    ASSERT(start + length <= m_stringLength);
+    ASSERT(start + length <= length());
     CSSParserString result;
     if (m_string->is8Bit())
         result.init(m_string->characters8() + start, length);
     else
         result.init(m_string->characters16() + start, length);
     return result;
 }
 
 } // namespace blink