Use a union typdef for the return type of canvas.getContext

third_party/WebKit/Source/modules/canvas2d/CanvasRenderingContext2D.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2007 Alp Toker <alp@atoker.com>
  * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008 Dirk Schulze <krit@webkit.org>
  * Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. All rights reserved.
  * Copyright (C) 2012, 2013 Intel Corporation. All rights reserved.
  * Copyright (C) 2013 Adobe Systems Incorporated. All rights reserved.
  *
@@ skipping 109 matching lines @@
     , m_pruneLocalFontCacheScheduled(false)
 {
     if (document.settings() && document.settings()->antialiasedClips2dCanvasEnabled())
         m_clipAntialiasing = AntiAliased;
     setShouldAntialias(true);
 #if ENABLE(OILPAN)
     ThreadState::current()->registerPreFinalizer(this);
 #endif
 }
 
+void CanvasRenderingContext2D::setCanvasGetContextResult(RenderingContext& result)
+{
+    result.setCanvasRenderingContext2D(RefPtrWillBeRawPtr<CanvasRenderingContext2D>(this));

[Ken Russell (switch to Gerrit), 2016/03/09 19:59:38]

Here and throughout: is this the correct type to use at this point in Oilpan's
development? (+haraken, sof)

[sof, 2016/03/09 20:46:30]

A transition type is still in order & neeeded; when/if Oilpan is fully switched
to the generated code for unions will use CanvasRenderingContext2D* for this
setter.

But shouldn't it be PassRefPtrWillBeRawPtr<>?

+}
+
 void CanvasRenderingContext2D::unwindStateStack()
 {
     if (size_t stackSize = m_stateStack.size()) {
         if (SkCanvas* skCanvas = canvas()->existingDrawingCanvas()) {
             while (--stackSize)
                 skCanvas->restore();
         }
     }
 }
 
@@ skipping 875 matching lines @@
 
 unsigned CanvasRenderingContext2D::hitRegionsCount() const
 {
     if (m_hitRegionManager)
         return m_hitRegionManager->getHitRegionsCount();
 
     return 0;
 }
 
 } // namespace blink