View synchronization

mojo/services/public/cpp/view_manager/view.h

Index: mojo/services/public/cpp/view_manager/view.h
diff --git a/mojo/services/public/cpp/view_manager/view.h b/mojo/services/public/cpp/view_manager/view.h
index a0bba820542167b5eb42fe2bfa7cefb126a4da92..12ba55cb129238cca06f93822de97a3f46613f80 100644
--- a/mojo/services/public/cpp/view_manager/view.h
+++ b/mojo/services/public/cpp/view_manager/view.h
@@ -6,14 +6,45 @@
 #define MOJO_SERVICES_PUBLIC_CPP_VIEW_MANAGER_VIEW_H_
 
 #include "base/basictypes.h"
+#include "base/observer_list.h"
+#include "mojo/services/public/cpp/view_manager/view_manager_types.h"
 
 namespace mojo {
 namespace services {
 namespace view_manager {
 
+class ViewManager;
+class ViewObserver;
+class ViewTreeNode;
+
+// Views are owned by the ViewManager.
 class View {
  public:
+  static View* Create(ViewManager* manager);
+
+  void Destroy();
+
+  TransportViewId id() const { return id_; }
+  ViewTreeNode* node() { return node_; }
+
+  void AddObserver(ViewObserver* observer);
+  void RemoveObserver(ViewObserver* observer);
+
  private:
+  friend class ViewPrivate;
+
+  explicit View(ViewManager* manager);
+  View();
+  ~View();
+
+  void LocalDestroy();
+
+  TransportViewId id_;
+  ViewTreeNode* node_;
+  ViewManager* manager_;
+
+  ObserverList<ViewObserver> observers_;
+
   DISALLOW_COPY_AND_ASSIGN(View);
 };