Hook up BeginFrameSource to SurfaceFactoryClient via SurfaceManager

components/mus/ws/window_tree_unittest.cc

Index: components/mus/ws/window_tree_unittest.cc
diff --git a/components/mus/ws/window_tree_unittest.cc b/components/mus/ws/window_tree_unittest.cc
index e31150fa027cb09abde91cfb1e7ea07d09c86da6..6135cda84f0c0b8af5f7df6ed79ff6fdcdd76148 100644
--- a/components/mus/ws/window_tree_unittest.cc
+++ b/components/mus/ws/window_tree_unittest.cc
@@ -417,7 +417,8 @@ class WindowTreeTest : public testing::Test {
   WindowTreeTest()
       : wm_client_(nullptr),
         cursor_id_(0),
-        display_manager_factory_(&cursor_id_) {}
+        display_manager_factory_(&cursor_id_),
+        surfaces_state_(new SurfacesState()) {}
   ~WindowTreeTest() override {}
 
   // WindowTreeImpl for the window manager.
@@ -477,10 +478,10 @@ class WindowTreeTest : public testing::Test {
     DisplayManager::set_factory_for_testing(&display_manager_factory_);
     // TODO(fsamuel): This is probably broken. We need a root.
     connection_manager_.reset(
-        new ConnectionManager(&delegate_, scoped_refptr<SurfacesState>()));
-    window_tree_host_ = new WindowTreeHostImpl(
-        connection_manager_.get(), nullptr, scoped_refptr<GpuState>(),
-        scoped_refptr<mus::SurfacesState>());
+        new ConnectionManager(&delegate_, surfaces_state_));
+    window_tree_host_ =
+        new WindowTreeHostImpl(connection_manager_.get(), nullptr,
+                               scoped_refptr<GpuState>(), surfaces_state_);
     // TODO(fsamuel): This is way too magical. We need to find a better way to
     // manage lifetime.
     host_connection_ = new TestWindowTreeHostConnection(
@@ -497,6 +498,7 @@ class WindowTreeTest : public testing::Test {
   TestConnectionManagerDelegate delegate_;
   TestWindowTreeHostConnection* host_connection_;
   WindowTreeHostImpl* window_tree_host_ = nullptr;
+  scoped_refptr<SurfacesState> surfaces_state_;
   scoped_ptr<ConnectionManager> connection_manager_;
   base::MessageLoop message_loop_;