Revert of Start of display management for mus

components/mus/ws/window_tree_host_impl.h

Index: components/mus/ws/window_tree_host_impl.h
diff --git a/components/mus/ws/window_tree_host_impl.h b/components/mus/ws/window_tree_host_impl.h
index 850b3ee3107c12cac350ea619b6658946c3981f0..5247b01ba83be0f97fb99523a0f188c5f3c99844 100644
--- a/components/mus/ws/window_tree_host_impl.h
+++ b/components/mus/ws/window_tree_host_impl.h
@@ -56,8 +56,6 @@
   // Initializes state that depends on the existence of a WindowTreeHostImpl.
   void Init(WindowTreeHostDelegate* delegate);
 
-  uint32_t id() const { return id_; }
-
   const WindowTreeImpl* GetWindowTree() const;
   WindowTreeImpl* GetWindowTree();
 
@@ -81,8 +79,6 @@
 
   // Returns the metrics for this viewport.
   const mojom::ViewportMetrics& GetViewportMetrics() const;
-
-  mojom::Rotation GetRotation() const;
 
   ConnectionManager* connection_manager() { return connection_manager_; }
 
@@ -226,8 +222,6 @@
   std::queue<scoped_ptr<QueuedEvent>> event_queue_;
   base::OneShotTimer event_ack_timer_;
 
-  const uint32_t id_;
-
   DISALLOW_COPY_AND_ASSIGN(WindowTreeHostImpl);
 };