Make CSSPropertyParser::parseSingleValue return a const CSSValue*

third_party/WebKit/Source/core/css/CSSMatrix.cpp

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 52 matching lines @@
     RefPtr<ComputedStyle> initialStyle = ComputedStyle::create();
     initialStyle->font().update(nullptr);
     return initialStyle;
 }
 
 void CSSMatrix::setMatrixValue(const String& string, ExceptionState& exceptionState)
 {
     if (string.isEmpty())
         return;
 
-    if (CSSValue* value = CSSParser::parseSingleValue(CSSPropertyTransform, string)) {
+    if (const CSSValue* value = CSSParser::parseSingleValue(CSSPropertyTransform, string)) {
         // Check for a "none" transform. In these cases we can use the default identity matrix.
         if (value->isPrimitiveValue() && (toCSSPrimitiveValue(value))->getValueID() == CSSValueNone)
             return;
 
         DEFINE_STATIC_REF(ComputedStyle, initialStyle, createInitialStyle());
         TransformOperations operations;
         TransformBuilder::createTransformOperations(*value, CSSToLengthConversionData(initialStyle, initialStyle, LayoutViewItem(nullptr), 1.0f), operations);
 
         // Convert transform operations to a TransformationMatrix. This can fail
         // if a param has a percentage ('%')
@@ skipping 100 matching lines @@
     if (m_matrix->isAffine())
         return String::format("matrix(%f, %f, %f, %f, %f, %f)", m_matrix->a(), m_matrix->b(), m_matrix->c(), m_matrix->d(), m_matrix->e(), m_matrix->f());
     return String::format("matrix3d(%f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f)",
     m_matrix->m11(), m_matrix->m12(), m_matrix->m13(), m_matrix->m14(),
     m_matrix->m21(), m_matrix->m22(), m_matrix->m23(), m_matrix->m24(),
     m_matrix->m31(), m_matrix->m32(), m_matrix->m33(), m_matrix->m34(),
     m_matrix->m41(), m_matrix->m42(), m_matrix->m43(), m_matrix->m44());
 }
 
 } // namespace blink