Remove mutable from ComputedStyle by const_cast.

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

Index: third_party/WebKit/Source/core/css/CSSToLengthConversionData.cpp
diff --git a/third_party/WebKit/Source/core/css/CSSToLengthConversionData.cpp b/third_party/WebKit/Source/core/css/CSSToLengthConversionData.cpp
index 5b73defda1de5d815c8770d73f1eb73bccfb7518..9e992d62326731e4b41cf2fe4b7064d6dde940ed 100644
--- a/third_party/WebKit/Source/core/css/CSSToLengthConversionData.cpp
+++ b/third_party/WebKit/Source/core/css/CSSToLengthConversionData.cpp
@@ -98,24 +98,24 @@ CSSToLengthConversionData::CSSToLengthConversionData(
                                 zoom) {}
 
 double CSSToLengthConversionData::viewportWidthPercent() const {
-  m_style->setHasViewportUnits();
+  const_cast<ComputedStyle*>(m_style)->setHasViewportUnits();

[alancutter (OOO until 2018), 2017/04/05 05:22:23]

Let's add a TODO to plumb these bits through as output parameters instead of
const_casting.

[shend, 2017/04/05 06:19:11]

Done.

   return m_viewportSize.width() / 100;
 }
 double CSSToLengthConversionData::viewportHeightPercent() const {
-  m_style->setHasViewportUnits();
+  const_cast<ComputedStyle*>(m_style)->setHasViewportUnits();
   return m_viewportSize.height() / 100;
 }
 double CSSToLengthConversionData::viewportMinPercent() const {
-  m_style->setHasViewportUnits();
+  const_cast<ComputedStyle*>(m_style)->setHasViewportUnits();
   return std::min(m_viewportSize.width(), m_viewportSize.height()) / 100;
 }
 double CSSToLengthConversionData::viewportMaxPercent() const {
-  m_style->setHasViewportUnits();
+  const_cast<ComputedStyle*>(m_style)->setHasViewportUnits();
   return std::max(m_viewportSize.width(), m_viewportSize.height()) / 100;
 }
 
 float CSSToLengthConversionData::remFontSize() const {
-  m_style->setHasRemUnits();
+  const_cast<ComputedStyle*>(m_style)->setHasRemUnits();
   return m_fontSizes.rem();
 }