cc: Make OutputSurface::BindToClient pure virtual and not return bool

content/browser/compositor/mus_browser_compositor_output_surface.cc

Index: content/browser/compositor/mus_browser_compositor_output_surface.cc
diff --git a/content/browser/compositor/mus_browser_compositor_output_surface.cc b/content/browser/compositor/mus_browser_compositor_output_surface.cc
index a3b81c66a71e15bfa5cb296ce8b3f5a3deba468a..8f2ee8b241c4432c1416f088ffc7f0f87e5c9ecd 100644
--- a/content/browser/compositor/mus_browser_compositor_output_surface.cc
+++ b/content/browser/compositor/mus_browser_compositor_output_surface.cc
@@ -33,6 +33,7 @@ MusBrowserCompositorOutputSurface::MusBrowserCompositorOutputSurface(
       ui_window_(window) {
   ui_compositor_frame_sink_ = ui_window_->RequestCompositorFrameSink(
       ui::mojom::CompositorFrameSinkType::DEFAULT, context);
+  ui_compositor_frame_sink_->BindToClient(this);
 }
 
 MusBrowserCompositorOutputSurface::~MusBrowserCompositorOutputSurface() {}
@@ -109,14 +110,6 @@ void MusBrowserCompositorOutputSurface::SwapBuffers(
   return;
 }
 
-bool MusBrowserCompositorOutputSurface::BindToClient(
-    cc::OutputSurfaceClient* client) {
-  if (!GpuBrowserCompositorOutputSurface::BindToClient(client))
-    return false;
-  ui_compositor_frame_sink_->BindToClient(this);
-  return true;
-}
-
 void MusBrowserCompositorOutputSurface::SetBeginFrameSource(
     cc::BeginFrameSource* source) {}