Oilpan: fix build after r351868.

third_party/WebKit/Source/core/paint/ScrollbarPainter.cpp

Index: third_party/WebKit/Source/core/paint/ScrollbarPainter.cpp
diff --git a/third_party/WebKit/Source/core/paint/ScrollbarPainter.cpp b/third_party/WebKit/Source/core/paint/ScrollbarPainter.cpp
index 53b6321361b82099db3e4a10894379fe35f10b31..c1ef8c912f9d9b3d0cacdbd934a73dab6ae021a2 100644
--- a/third_party/WebKit/Source/core/paint/ScrollbarPainter.cpp
+++ b/third_party/WebKit/Source/core/paint/ScrollbarPainter.cpp
@@ -15,10 +15,10 @@ namespace blink {
 
 void ScrollbarPainter::paintPart(GraphicsContext* graphicsContext, ScrollbarPart partType, const IntRect& rect)
 {
-    const LayoutScrollbarPart* partLayoutObject = m_layoutScrollbar.getPart(partType);
+    const LayoutScrollbarPart* partLayoutObject = m_layoutScrollbar->getPart(partType);
     if (!partLayoutObject)
         return;
-    paintIntoRect(*partLayoutObject, graphicsContext, m_layoutScrollbar.location(), LayoutRect(rect));
+    paintIntoRect(*partLayoutObject, graphicsContext, m_layoutScrollbar->location(), LayoutRect(rect));
 }
 
 void ScrollbarPainter::paintIntoRect(const LayoutScrollbarPart& layoutScrollbarPart, GraphicsContext* graphicsContext, const LayoutPoint& paintOffset, const LayoutRect& rect)