Mac: Clean up ifdefs in output surface

content/browser/compositor/browser_compositor_output_surface.cc

Index: content/browser/compositor/browser_compositor_output_surface.cc
diff --git a/content/browser/compositor/browser_compositor_output_surface.cc b/content/browser/compositor/browser_compositor_output_surface.cc
index eb2a98cfa3a693ca44214ccd48f2c2ff7d8b4b0e..14347518e4d42a331469a6abc3a45856cbbae63e 100644
--- a/content/browser/compositor/browser_compositor_output_surface.cc
+++ b/content/browser/compositor/browser_compositor_output_surface.cc
@@ -151,4 +151,9 @@ BrowserCompositorOutputSurface::GetOverlayCandidateValidator() const {
   return overlay_candidate_validator_.get();
 }
 
+#if defined(OS_MACOSX)
+void BrowserCompositorOutputSurface::SetSurfaceSuspendedForRecycle(
+    bool suspended) {}
+#endif
+
 }  // namespace content