Revert of Change exo::SurfaceFactoryOwner to exo::ExoCompositorFrameSink

ash/test/ash_test_helper.cc

Index: ash/test/ash_test_helper.cc
diff --git a/ash/test/ash_test_helper.cc b/ash/test/ash_test_helper.cc
index e28ad840df1bfe97163769c950a49f53ae6c0a5d..5764c4af79f2b452d383e52d9da5268da7df7aa8 100644
--- a/ash/test/ash_test_helper.cc
+++ b/ash/test/ash_test_helper.cc
@@ -160,10 +160,6 @@
 void AshTestHelper::TearDown() {
   // Tear down the shell.
   Shell::DeleteInstance();
-
-  // Suspend the tear down until all resources are returned via
-  // MojoCompositorFrameSinkClient::ReclaimResources()
-  RunAllPendingInMessageLoop();
   material_design_state_.reset();
   test::MaterialDesignControllerTestAPI::Uninitialize();
   ash_test_environment_->TearDown();