Use refs for GraphicsContext

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

Index: third_party/WebKit/Source/core/paint/BoxClipper.cpp
diff --git a/third_party/WebKit/Source/core/paint/BoxClipper.cpp b/third_party/WebKit/Source/core/paint/BoxClipper.cpp
index 6355078338ba7f8605031ba53decf96cabb74ae5..ac13973d42cbddb149dc5be30516f9bd4cb7ab7a 100644
--- a/third_party/WebKit/Source/core/paint/BoxClipper.cpp
+++ b/third_party/WebKit/Source/core/paint/BoxClipper.cpp
@@ -50,12 +50,12 @@ BoxClipper::BoxClipper(const LayoutBox& box, const PaintInfo& paintInfo, const L
             return;
     }
 
-    if (!m_paintInfo.context->paintController().displayItemConstructionIsDisabled()) {
+    if (!m_paintInfo.context.paintController().displayItemConstructionIsDisabled()) {
         m_clipType = m_paintInfo.displayItemTypeForClipping();
         Vector<FloatRoundedRect> roundedRects;
         if (hasBorderRadius)
             roundedRects.append(clipRoundedRect);
-        m_paintInfo.context->paintController().createAndAppend<ClipDisplayItem>(m_box, m_clipType, pixelSnappedIntRect(clipRect), roundedRects);
+        m_paintInfo.context.paintController().createAndAppend<ClipDisplayItem>(m_box, m_clipType, pixelSnappedIntRect(clipRect), roundedRects);
     }
 }
 
@@ -65,7 +65,7 @@ BoxClipper::~BoxClipper()
         return;
 
     ASSERT(m_box.hasControlClip() || (m_box.hasOverflowClip() && !m_box.layer()->isSelfPaintingLayer()));
-    m_paintInfo.context->paintController().endItem<EndClipDisplayItem>(m_box, DisplayItem::clipTypeToEndClipType(m_clipType));
+    m_paintInfo.context.paintController().endItem<EndClipDisplayItem>(m_box, DisplayItem::clipTypeToEndClipType(m_clipType));
 }
 
 } // namespace blink