Update view_manager and window_manager to make use of content handling.

mojo/public/cpp/application/interface_factory_impl.h

Index: mojo/public/cpp/application/interface_factory_impl.h
diff --git a/mojo/public/cpp/application/interface_factory_impl.h b/mojo/public/cpp/application/interface_factory_impl.h
index 2d020f8767b17da0aafe1a16d5fc03786bcba29b..65992727a610cf31fc9a99946f02bd1ecd976229 100644
--- a/mojo/public/cpp/application/interface_factory_impl.h
+++ b/mojo/public/cpp/application/interface_factory_impl.h
@@ -35,6 +35,10 @@ class InterfaceFactoryImplWithContext : public InterfaceFactory<Interface> {
       : context_(context) {}
   virtual ~InterfaceFactoryImplWithContext() {}
 
+  void set_context(Context* context) {
+    context_ = context;
+  }
+
   virtual void Create(ApplicationConnection* connection,
                       InterfaceRequest<Interface> request) MOJO_OVERRIDE {
     BindToRequest(new Impl(context_), &request);