diff -Naur a/Source/WebCore/inspector/agents/InspectorCanvasAgent.h b/Source/WebCore/inspector/agents/InspectorCanvasAgent.h --- a/Source/WebCore/inspector/agents/InspectorCanvasAgent.h 2021-09-01 09:16:50.000000000 +0000 +++ b/Source/WebCore/inspector/agents/InspectorCanvasAgent.h 2021-11-28 18:15:30.917281409 +0000 @@ -44,6 +44,7 @@ namespace WebCore { class CanvasRenderingContext; +class Frame; #if ENABLE(WEBGL) class InspectorShaderProgram; class WebGLProgram;