Plumb through surface size for --enable-partial-swaps on OSX

content/browser/renderer_host/render_widget_host_view_mac.mm

Index: content/browser/renderer_host/render_widget_host_view_mac.mm
diff --git a/content/browser/renderer_host/render_widget_host_view_mac.mm b/content/browser/renderer_host/render_widget_host_view_mac.mm
index 8eced50e5c77db4fea687dfe56c518c70fba385a..a7cc0c0b94688d454ffa0b44fb3de04b3767dedc 100644
--- a/content/browser/renderer_host/render_widget_host_view_mac.mm
+++ b/content/browser/renderer_host/render_widget_host_view_mac.mm
@@ -1228,8 +1228,8 @@ void RenderWidgetHostViewMac::AcceleratedSurfacePostSubBuffer(
   // TODO(jbates) http://crbug.com/105344 This will be removed when there are no
   // plugin windows.
   if (params.window == gfx::kNullPluginWindow) {
-    NOTIMPLEMENTED();
-    AckPendingSwapBuffers();
+    if (CompositorSwapBuffers(params.surface_handle, params.surface_size))
+      AckPendingSwapBuffers();
   } else {
     // Deprecated accelerated plugin code path.
     AcceleratedPluginView* view = ViewForPluginWindowHandle(params.window);