--- a/Source/WebCore/inspector/agents/InspectorCanvasAgent.h	2021-09-01 09:16:50.000000000 +0000
+++ a/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;