Don't issue any extra geometry for the IOSurface leak workaround

content/browser/renderer_host/compositing_iosurface_mac.h

Index: content/browser/renderer_host/compositing_iosurface_mac.h
diff --git a/content/browser/renderer_host/compositing_iosurface_mac.h b/content/browser/renderer_host/compositing_iosurface_mac.h
index e250981d4f6649bcf334325974dea7b785b9f3f4..4dc78aa8a933fafb032d2e2787e3813c76c2fa4d 100644
--- a/content/browser/renderer_host/compositing_iosurface_mac.h
+++ b/content/browser/renderer_host/compositing_iosurface_mac.h
@@ -196,10 +196,6 @@ class CompositingIOSurfaceMac {
                           bool is_vsync_disabled,
                           CVDisplayLinkRef display_link);
 
-  // Issue a draw call to try to flush references to an IOSurface out of
-  // the GL driver.
-  void DoWorkaroundForIOSurfaceLeak();
-
   // Returns true if IOSurface is ready to render. False otherwise.
   bool MapIOSurfaceToTexture(uint64 io_surface_handle);