Use refs for GraphicsContext

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

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "core/paint/BoxClipper.h"
 
 #include "core/layout/LayoutBox.h"
 #include "core/paint/PaintInfo.h"
 #include "core/paint/PaintLayer.h"
@@ skipping 32 matching lines @@
         LayoutRect conservativeClipRect = clipRect;
         if (hasBorderRadius)
             conservativeClipRect.intersect(LayoutRect(clipRoundedRect.radiusCenterRect()));
         conservativeClipRect.moveBy(-accumulatedOffset);
         if (m_box.hasLayer())
             conservativeClipRect.move(m_box.scrolledContentOffset());
         if (conservativeClipRect.contains(contentsVisualOverflow))
             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);
     }
 }
 
 BoxClipper::~BoxClipper()
 {
     if (m_clipType == DisplayItem::UninitializedType)
         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