1 files changed, 4 insertions, 1 deletions
diff --git a/gfx/webrender_bindings/DCLayerTree.h b/gfx/webrender_bindings/DCLayerTree.h
index 6d3a611802..d5ade5781e 100644
--- a/gfx/webrender_bindings/DCLayerTree.h
+++ b/gfx/webrender_bindings/DCLayerTree.h
@@ -113,7 +113,7 @@ class DCLayerTree {
 
   explicit DCLayerTree(gl::GLContext* aGL, EGLConfig aEGLConfig,
                        ID3D11Device* aDevice, ID3D11DeviceContext* aCtx,
-                       IDCompositionDevice2* aCompositionDevice);
+                       HWND aHwnd, IDCompositionDevice2* aCompositionDevice);
   ~DCLayerTree();
 
   void SetDefaultSwapChain(IDXGISwapChain1* aSwapChain);
@@ -159,6 +159,8 @@ class DCLayerTree {
 
   DCSurface* GetSurface(wr::NativeSurfaceId aId) const;
 
+  HWND GetHwnd() const { return mHwnd; }
+
   // Get or create an FBO with depth buffer suitable for specified dimensions
   GLuint GetOrCreateFbo(int aWidth, int aHeight);
 
@@ -187,6 +189,7 @@ class DCLayerTree {
 
   RefPtr<ID3D11Device> mDevice;
   RefPtr<ID3D11DeviceContext> mCtx;
+  HWND mHwnd;
 
   RefPtr<IDCompositionDevice2> mCompositionDevice;
   RefPtr<IDCompositionTarget> mCompositionTarget;