Call OnSwapBuffersComplete at the end of each frame

cc/test/fake_output_surface.cc

Index: cc/test/fake_output_surface.cc
diff --git a/cc/test/fake_output_surface.cc b/cc/test/fake_output_surface.cc
index 6c5bc9f849d0fc95ec0b7c4637aeb04c4c35a036..b32897b5734208573b77024bc85ce9ff40c3ca93 100644
--- a/cc/test/fake_output_surface.cc
+++ b/cc/test/fake_output_surface.cc
@@ -41,6 +41,16 @@ void FakeOutputSurface::SendFrameToParentCompositor(
                             weak_ptr_factory_.GetWeakPtr()));
 }
 
+void FakeOutputSurface::SwapBuffers(const ui::LatencyInfo& latency_info) {
+  if (ForcedDrawToSoftwareDevice() || !context3d()) {
+    base::MessageLoop::current()->PostTask(
+        FROM_HERE, base::Bind(&OutputSurfaceClient::OnSwapBuffersComplete,
+                              base::Unretained(client_)));
+  } else {
+    OutputSurface::SwapBuffers(latency_info);
+  }
+}
+
 void FakeOutputSurface::SetNeedsBeginFrame(bool enable) {
   needs_begin_frame_ = enable;
 }