| Index: Source/core/html/HTMLCanvasElement.h | 
| diff --git a/Source/core/html/HTMLCanvasElement.h b/Source/core/html/HTMLCanvasElement.h | 
| index 1338d3d3cd09a0b6578ebc3f146544d6c7b89afc..73f6514589fe03833240ee50a0f0ccd0ee75c8ba 100644 | 
| --- a/Source/core/html/HTMLCanvasElement.h | 
| +++ b/Source/core/html/HTMLCanvasElement.h | 
| @@ -55,6 +55,7 @@ class HTMLCanvasElement; | 
| class Image; | 
| class ImageBuffer; | 
| class ImageBufferSurface; | 
| +class ImageData; | 
| class IntSize; | 
|  | 
| class CORE_EXPORT CanvasObserver : public WillBeGarbageCollectedMixin { | 
| @@ -199,6 +200,7 @@ private: | 
|  | 
| bool paintsIntoCanvasBuffer() const; | 
|  | 
| +    ImageData* toImageData(SourceDrawingBuffer) const; | 
| String toDataURLInternal(const String& mimeType, const double* quality, SourceDrawingBuffer) const; | 
|  | 
| WillBeHeapHashSet<RawPtrWillBeWeakMember<CanvasObserver>> m_observers; | 
|  |