Compute initial values for registered custom properties.

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

 /*
  * Copyright (C) 2013 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 67 matching lines @@
 
 CSSToLengthConversionData::CSSToLengthConversionData(
     const ComputedStyle* style,
     const FontSizes& fontSizes,
     const ViewportSize& viewportSize,
     float zoom)
     : m_style(style),
       m_fontSizes(fontSizes),
       m_viewportSize(viewportSize),
       m_zoom(clampTo<float>(zoom, std::numeric_limits<float>::denorm_min())) {
-  ASSERT(m_style);
 }
 
 CSSToLengthConversionData::CSSToLengthConversionData(
     const ComputedStyle* style,
     const ComputedStyle* rootStyle,
     const LayoutViewItem& layoutViewItem,
     float zoom)
     : CSSToLengthConversionData(style,
                                 FontSizes(style, rootStyle),
                                 ViewportSize(layoutViewItem),
@@ skipping 77 matching lines @@
     case CSSPrimitiveValue::UnitType::Chs:
       return value * chFontSize();
 
     default:
       ASSERT_NOT_REACHED();
       return 0;
   }
 }
 
 }  // namespace blink