Oilpan: move the GradientStop value object off the heap.

Source/core/css/CSSGradientValue.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 83 matching lines @@
 void CSSGradientValue::sortStopsIfNeeded()
 {
     ASSERT(m_gradientType == CSSDeprecatedLinearGradient || m_gradientType == CSSDeprecatedRadialGradient);
     if (!m_stopsSorted) {
         if (m_stops.size())
             std::stable_sort(m_stops.begin(), m_stops.end(), compareStops);
         m_stopsSorted = true;
     }
 }
 
-class GradientStop {
-    ALLOW_ONLY_INLINE_ALLOCATION();
-public:
+struct GradientStop {
     Color color;
     float offset;
     bool specified;
 
     GradientStop()
         : offset(0)
         , specified(false)
     { }
 };
 
-void replaceColorHintsWithColorStops(WillBeHeapVector<GradientStop>& stops, const WillBeHeapVector<CSSGradientColorStop, 2>& cssGradientStops)
+static void replaceColorHintsWithColorStops(Vector<GradientStop>& stops, const WillBeHeapVector<CSSGradientColorStop, 2>& cssGradientStops)
 {
     // This algorithm will replace each color interpolation hint with 9 regular
     // color stops. The color values for the new color stops will be calculated
     // using the color weighting formula defined in the spec. The new color
     // stops will be positioned in such a way that all the pixels between the two
     // user defined color stops have color values close to the interpolation curve.
     // If the hint is closer to the left color stop, add 2 stops to the left and
     // 6 to the right, else add 6 stops to the left and 2 to the right.
     // The color stops on the side with more space start midway because
     // the curve approximates a line in that region.
@@ skipping 94 matching lines @@
                 offset = stop.m_position->getFloatValue(CSSPrimitiveValue::CSS_NUMBER);
 
             gradient->addColorStop(offset, resolveStopColor(stop.m_color.get(), object));
         }
 
         return;
     }
 
     size_t numStops = m_stops.size();
 
-    WillBeHeapVector<GradientStop> stops(numStops);
+    Vector<GradientStop> stops(numStops);
 
     float gradientLength = 0;
     bool computedGradientLength = false;
 
     bool hasHints = false;
 
     FloatPoint gradientStart = gradient->p0();
     FloatPoint gradientEnd;
     if (isLinearGradientValue())
         gradientEnd = gradient->p1();
@@ skipping 1023 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