[wrapper-tracing] WebGL and friends: Add write barriers

third_party/WebKit/Source/core/html/HTMLCanvasElement.h

 /*
  * Copyright (C) 2004, 2006, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alp Toker <alp@atoker.com>
  * Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. 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.
@@ skipping 11 matching lines @@
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef HTMLCanvasElement_h
 #define HTMLCanvasElement_h
 
 #include "bindings/core/v8/ScriptValue.h"
+#include "bindings/core/v8/ScriptWrappableVisitor.h"
 #include "core/CoreExport.h"
 #include "core/dom/ContextLifecycleObserver.h"
 #include "core/dom/DOMTypedArray.h"
 #include "core/dom/Document.h"
 #include "core/fileapi/BlobCallback.h"
 #include "core/html/HTMLElement.h"
 #include "core/html/canvas/CanvasDrawListener.h"
 #include "core/html/canvas/CanvasImageSource.h"
 #include "core/imagebitmap/ImageBitmapSource.h"
 #include "core/page/PageVisibilityObserver.h"
@@ skipping 242 matching lines @@
   ImageData* toImageData(SourceDrawingBuffer, SnapshotReason) const;
 
   String toDataURLInternal(const String& mimeType,
                            const double& quality,
                            SourceDrawingBuffer) const;
 
   HeapHashSet<WeakMember<CanvasDrawListener>> m_listeners;
 
   IntSize m_size;
 
-  Member<CanvasRenderingContext> m_context;
+  TraceWrapperMember<CanvasRenderingContext> m_context;
 
   bool m_ignoreReset;
   FloatRect m_dirtyRect;
 
   mutable intptr_t m_externallyAllocatedMemory;
 
   bool m_originClean;
 
   // It prevents HTMLCanvasElement::buffer() from continuously re-attempting to
   // allocate an imageBuffer after the first attempt failed.
   mutable bool m_didFailToCreateImageBuffer;
   bool m_imageBufferIsClear;
   std::unique_ptr<ImageBuffer> m_imageBuffer;
 
   // FIXME: This is temporary for platforms that have to copy the image buffer
   // to render (and for CSSCanvasValue).
   mutable RefPtr<Image> m_copiedImage;
 
   // Used for OffscreenCanvas that controls this HTML canvas element
   std::unique_ptr<CanvasSurfaceLayerBridge> m_surfaceLayerBridge;
 
   int m_numFramesSinceLastRenderingModeSwitch;
   bool m_pendingRenderingModeSwitch;
 };
 
 }  // namespace blink
 
 #endif  // HTMLCanvasElement_h