Revert of Make SingleThreadProxy a SchedulerClient

cc/trees/layer_tree_host_unittest_no_message_loop.cc

Index: cc/trees/layer_tree_host_unittest_no_message_loop.cc
diff --git a/cc/trees/layer_tree_host_unittest_no_message_loop.cc b/cc/trees/layer_tree_host_unittest_no_message_loop.cc
index ea3bfc60b5fd4ad58aa90350169af65864aa27ab..1a24ba5c51c6a17946680d77b8ebc49335b37c92 100644
--- a/cc/trees/layer_tree_host_unittest_no_message_loop.cc
+++ b/cc/trees/layer_tree_host_unittest_no_message_loop.cc
@@ -74,6 +74,8 @@
   virtual void DidCompleteSwapBuffers() OVERRIDE {}
 
   // LayerTreeHostSingleThreadClient overrides.
+  virtual void ScheduleComposite() OVERRIDE {}
+  virtual void ScheduleAnimation() OVERRIDE {}
   virtual void DidPostSwapBuffers() OVERRIDE {}
   virtual void DidAbortSwapBuffers() OVERRIDE {}
 
@@ -94,7 +96,6 @@
 
   void SetupLayerTreeHost() {
     LayerTreeSettings settings;
-    settings.single_thread_proxy_scheduler = false;
     layer_tree_host_ =
         LayerTreeHost::CreateSingleThreaded(this, this, NULL, settings, NULL);
     layer_tree_host_->SetViewportSize(size_);