Make OffscreenCanvas a member of CanvasImageSource

third_party/WebKit/Source/modules/imagebitmap/ImageBitmapRenderingContext.h

Index: third_party/WebKit/Source/modules/imagebitmap/ImageBitmapRenderingContext.h
diff --git a/third_party/WebKit/Source/modules/imagebitmap/ImageBitmapRenderingContext.h b/third_party/WebKit/Source/modules/imagebitmap/ImageBitmapRenderingContext.h
index cb766dcaa4a16f21930e328988b63b82a76cbd05..22038c096dc8fa52d6e97aee44765746d8573d03 100644
--- a/third_party/WebKit/Source/modules/imagebitmap/ImageBitmapRenderingContext.h
+++ b/third_party/WebKit/Source/modules/imagebitmap/ImageBitmapRenderingContext.h
@@ -37,7 +37,7 @@ public:
     bool isContextLost() const override { return false; }
     bool paint(GraphicsContext&, const IntRect&) override;
     void setCanvasGetContextResult(RenderingContext&) final;
-    PassRefPtr<Image> getImage() const final { return m_image.get(); }
+    PassRefPtr<Image> getImage(SnapshotReason) const final { return m_image.get(); }
 
     // TODO(junov): Implement GPU accelerated rendering using a layer bridge
     WebLayer* platformLayer() const override { return nullptr; }
@@ -46,6 +46,8 @@ public:
 
     void stop() override;
 
+    bool isPaintable() const final { return m_image.get(); }
+
     virtual ~ImageBitmapRenderingContext();
 
 private:
@@ -53,8 +55,6 @@ private:
 
     bool m_hasAlpha;
     RefPtr<Image> m_image;
-
-    bool isPaintable() const final { return m_image.get(); }
 };
 
 DEFINE_TYPE_CASTS(ImageBitmapRenderingContext, CanvasRenderingContext, context,