Use refs for GraphicsContext

third_party/WebKit/Source/core/editing/CaretBase.cpp

 /*
  * Copyright (C) 2004, 2008, 2009, 2010 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 157 matching lines @@
 {
     if (caretRectChanged)
         return;
 
     if (LayoutView* view = node->document().layoutView()) {
         if (node->isContentEditable(Node::UserSelectAllIsAlwaysNonEditable) || shouldRepaintCaret(view))
             invalidateLocalCaretRect(node, localCaretRectWithoutUpdate());
     }
 }
 
-void CaretBase::paintCaret(Node* node, GraphicsContext* context, const LayoutPoint& paintOffset) const
+void CaretBase::paintCaret(Node* node, GraphicsContext& context, const LayoutPoint& paintOffset) const
 {
     if (m_caretVisibility == Hidden)
         return;
 
     LayoutRect drawingRect = localCaretRectWithoutUpdate();
     if (LayoutBlock* layoutObject = caretLayoutObject(node))
         layoutObject->flipForWritingMode(drawingRect);
     drawingRect.moveBy(roundedIntPoint(paintOffset));
 
     Color caretColor = Color::black;
 
     Element* element;
     if (node->isElementNode())
         element = toElement(node);
     else
         element = node->parentElement();
 
     if (element && element->layoutObject())
         caretColor = element->layoutObject()->resolveColor(CSSPropertyColor);
 
-    context->fillRect(FloatRect(drawingRect), caretColor);
+    context.fillRect(FloatRect(drawingRect), caretColor);
 }
 
 } // namespace blink