Update renderer in core/css.

Source/core/css/CSSGradientValue.cpp

 /*
  * Copyright (C) 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2015 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:
  * 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
@@ skipping 33 matching lines @@
 #include <utility>
 
 namespace blink {
 
 DEFINE_TRACE(CSSGradientColorStop)
 {
     visitor->trace(m_position);
     visitor->trace(m_color);
 }
 
-PassRefPtr<Image> CSSGradientValue::image(LayoutObject* renderer, const IntSize& size)
+PassRefPtr<Image> CSSGradientValue::image(LayoutObject* layoutObject, const IntSize& size)
 {
     if (size.isEmpty())
         return nullptr;
 
     bool cacheable = isCacheable();
     if (cacheable) {
-        if (!clients().contains(renderer))
+        if (!clients().contains(layoutObject))
             return nullptr;
 
         // Need to look up our size.  Create a string of width*height to use as a hash key.
-        Image* result = getImage(renderer, size);
+        Image* result = getImage(layoutObject, size);
         if (result)
             return result;
     }
 
     // We need to create an image.
     RefPtr<Gradient> gradient;
 
-    const ComputedStyle* rootStyle = renderer->document().documentElement()->computedStyle();
-    CSSToLengthConversionData conversionData(renderer->style(), rootStyle, renderer->view(), renderer->style()->effectiveZoom());
+    const ComputedStyle* rootStyle = layoutObject->document().documentElement()->computedStyle();
+    CSSToLengthConversionData conversionData(layoutObject->style(), rootStyle, layoutObject->view(), layoutObject->style()->effectiveZoom());
     if (isLinearGradientValue())
-        gradient = toCSSLinearGradientValue(this)->createGradient(conversionData, size, *renderer);
+        gradient = toCSSLinearGradientValue(this)->createGradient(conversionData, size, *layoutObject);
     else
-        gradient = toCSSRadialGradientValue(this)->createGradient(conversionData, size, *renderer);
+        gradient = toCSSRadialGradientValue(this)->createGradient(conversionData, size, *layoutObject);
 
     RefPtr<Image> newImage = GradientGeneratedImage::create(gradient, size);
     if (cacheable)
         putImage(size, newImage);
 
     return newImage.release();
 }
 
 // Should only ever be called for deprecated gradients.
 static inline bool compareStops(const CSSGradientColorStop& a, const CSSGradientColorStop& b)
@@ skipping 1113 matching lines @@
     visitor->trace(m_firstRadius);
     visitor->trace(m_secondRadius);
     visitor->trace(m_shape);
     visitor->trace(m_sizingBehavior);
     visitor->trace(m_endHorizontalSize);
     visitor->trace(m_endVerticalSize);
     CSSGradientValue::traceAfterDispatch(visitor);
 }
 
 } // namespace blink