Refactor AcceleratedStaticBitmapImage

third_party/WebKit/Source/platform/graphics/gpu/DrawingBuffer.h

Index: third_party/WebKit/Source/platform/graphics/gpu/DrawingBuffer.h
diff --git a/third_party/WebKit/Source/platform/graphics/gpu/DrawingBuffer.h b/third_party/WebKit/Source/platform/graphics/gpu/DrawingBuffer.h
index 9acbaf3b2f3649d022e3d7930fa425bcb4e7bb3e..7daa5cc59c92f0e87709659caae26e3101afde25 100644
--- a/third_party/WebKit/Source/platform/graphics/gpu/DrawingBuffer.h
+++ b/third_party/WebKit/Source/platform/graphics/gpu/DrawingBuffer.h
@@ -44,6 +44,7 @@
 #include "wtf/Noncopyable.h"
 #include "wtf/RefCounted.h"
 #include "wtf/Vector.h"
+#include "wtf/WeakPtr.h"
 #include <memory>
 
 namespace cc {
@@ -515,6 +516,8 @@ class PLATFORM_EXPORT DrawingBuffer
   // DisallowChromiumImage in the case of OffscreenCanvas.
   ChromiumImageUsage m_chromiumImageUsage;
   bool shouldUseChromiumImage();
+
+  WeakPtrFactory<DrawingBuffer> m_weakPtrFactory;
 };
 
 }  // namespace blink