sync compositor: Add output_surface_id

content/renderer/render_widget.cc

Index: content/renderer/render_widget.cc
diff --git a/content/renderer/render_widget.cc b/content/renderer/render_widget.cc
index 8220160900f75fe023a3c0a1d38dff66b0598c90..e1d8f2a0bf9e89cb8b72d420aea819cee06ef69c 100644
--- a/content/renderer/render_widget.cc
+++ b/content/renderer/render_widget.cc
@@ -747,17 +747,18 @@ scoped_ptr<cc::OutputSurface> RenderWidget::CreateOutputSurface(bool fallback) {
       return nullptr;
     }
 
+    uint32_t output_surface_id = next_output_surface_id_++;
 #if defined(OS_ANDROID)
     if (SynchronousCompositorFactory* factory =
             SynchronousCompositorFactory::GetInstance()) {
       return factory->CreateOutputSurface(
-          routing_id(), frame_swap_message_queue_, context_provider,
-          worker_context_provider);
+          routing_id(), output_surface_id, frame_swap_message_queue_,
+          context_provider, worker_context_provider);
     } else if (RenderThreadImpl::current()->sync_compositor_message_filter()) {
       return make_scoped_ptr(new SynchronousCompositorOutputSurface(
           context_provider, worker_context_provider, routing_id(),
-          content::RenderThreadImpl::current()
-              ->sync_compositor_message_filter(),
+          output_surface_id, content::RenderThreadImpl::current()
+                                 ->sync_compositor_message_filter(),
           frame_swap_message_queue_));
     }
 #endif