Start of display management for mus

components/mus/ws/connection_manager.h

Index: components/mus/ws/connection_manager.h
diff --git a/components/mus/ws/connection_manager.h b/components/mus/ws/connection_manager.h
index 79210b5548038457892405dc2346e7033c5f9546..922ac5f637abb18bdb8a95484100cd967c6bee88 100644
--- a/components/mus/ws/connection_manager.h
+++ b/components/mus/ws/connection_manager.h
@@ -14,6 +14,7 @@
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/timer/timer.h"
+#include "components/mus/public/interfaces/display.mojom.h"
 #include "components/mus/public/interfaces/window_tree.mojom.h"
 #include "components/mus/public/interfaces/window_tree_host.mojom.h"
 #include "components/mus/surfaces/surfaces_state.h"
@@ -22,6 +23,8 @@
 #include "components/mus/ws/server_window_delegate.h"
 #include "components/mus/ws/server_window_observer.h"
 #include "components/mus/ws/window_tree_host_impl.h"
+#include "mojo/common/weak_binding_set.h"
+#include "mojo/common/weak_interface_ptr_set.h"
 #include "mojo/converters/surfaces/custom_surface_converter.h"
 #include "mojo/public/cpp/bindings/array.h"
 #include "mojo/public/cpp/bindings/binding.h"
@@ -37,8 +40,12 @@ class WindowTreeImpl;
 
 // ConnectionManager manages the set of connections to the window server (all
 // the WindowTreeImpls) as well as providing the root of the hierarchy.
+//
+// TODO(sky): this class is doing too much. Refactor to make responsibilities
+// clearer.
 class ConnectionManager : public ServerWindowDelegate,
-                          public ServerWindowObserver {
+                          public ServerWindowObserver,
+                          public mojom::DisplayManager {
  public:
   ConnectionManager(ConnectionManagerDelegate* delegate,
                     const scoped_refptr<mus::SurfacesState>& surfaces_state);
@@ -125,6 +132,9 @@ class ConnectionManager : public ServerWindowDelegate,
     return !host_connection_map_.empty();
   }
 
+  void AddDisplayManagerBinding(
+      mojo::InterfaceRequest<mojom::DisplayManager> request);
+
   // Returns a change id for the window manager that is associated with
   // |source| and |client_change_id|. When the window manager replies
   // WindowManagerChangeCompleted() is called to obtain the original source
@@ -254,6 +264,9 @@ class ConnectionManager : public ServerWindowDelegate,
   void OnTransientWindowRemoved(ServerWindow* window,
                                 ServerWindow* transient_child) override;
 
+  // Overriden from mojom::DisplayManager:
+  void AddObserver(mojom::DisplayManagerObserverPtr observer) override;
+
   ConnectionManagerDelegate* delegate_;
 
   // State for rendering into a Surface.
@@ -284,6 +297,10 @@ class ConnectionManager : public ServerWindowDelegate,
   // Next id supplied to the window manager.
   uint32_t next_wm_change_id_;
 
+  mojo::WeakBindingSet<mojom::DisplayManager> display_manager_bindings_;
+  mojo::WeakInterfacePtrSet<mojom::DisplayManagerObserver>
+      display_manager_observers_;
+
   DISALLOW_COPY_AND_ASSIGN(ConnectionManager);
 };