Create a RegisterViewAssociate method in ViewManager

services/ui/launcher/launch_instance.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "services/ui/launcher/launch_instance.h"
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/trace_event/trace_event.h"
 #include "mojo/application/application_runner_chromium.h"
@@ skipping 22 matching lines @@
   mojo::ConnectToService(app_impl_->shell(), "mojo:compositor_service",
                          GetProxy(&compositor_));
   compositor_.set_connection_error_handler(base::Bind(
       &LaunchInstance::OnCompositorConnectionError, base::Unretained(this)));
 
   mojo::ConnectToService(app_impl_->shell(), "mojo:view_manager_service",
                          GetProxy(&view_manager_));
   view_manager_.set_connection_error_handler(base::Bind(
       &LaunchInstance::OnViewManagerConnectionError, base::Unretained(this)));
 
+  /// Connect to ViewAssociates.
+  // TODO(mikejurka): get this from the commandline?
+  std::vector<std::string> associate_urls;  /// = command_line->GetArgs();
+  if (associate_urls.empty()) {
+    // TODO(jeffbrown): Replace this hardcoded list.
+    associate_urls.push_back("mojo:input_manager_service");
+  }
+
+  for (const auto& url : associate_urls) {
+    DVLOG(2) << "Connecting to ViewAssociate " << url;
+    // Connect to the ViewAssociate.
+    mojo::ui::ViewAssociatePtr associate;
+    mojo::ConnectToService(app_impl_->shell(), url, GetProxy(&associate));
+
+    // Wire up the associate to the ViewManager.
+    view_manager_->RegisterViewAssociate(associate.Pass(), url);
+  }
+
   InitViewport();
 
   mojo::ui::ViewProviderPtr client_view_provider;
   mojo::ConnectToService(app_impl_->shell(), app_url_,
                          GetProxy(&client_view_provider));
 
   client_view_provider->CreateView(GetProxy(&client_view_owner_), nullptr,
                                    nullptr);
 }
 
+void LaunchInstance::OnViewAssociateConnectionError(
+    const mojo::String& label,
+    const OnViewAssociateConnectionErrorCallback& callback) {
+  LOG(ERROR) << "Exiting due to view associate connection error.";
+  // TODO(mikejurka): should we even be running this callback?

[jeffbrown, 2016/05/17 00:44:49]

yes, all callbacks have to be invoked (unless you close the connection first)

+  callback.Run();
+  shutdown_callback_.Run();
+};
+
 void LaunchInstance::OnCompositorConnectionError() {
   LOG(ERROR) << "Exiting due to compositor connection error.";
   shutdown_callback_.Run();
 }
 
 void LaunchInstance::OnViewManagerConnectionError() {
   LOG(ERROR) << "Exiting due to view manager connection error.";
   shutdown_callback_.Run();
 }
 
@@ skipping 51 matching lines @@
 }
 
 void LaunchInstance::OnEvent(mojo::EventPtr event,
                              const mojo::Callback<void()>& callback) {
   if (view_tree_)
     view_tree_->DispatchEvent(event.Pass());
   callback.Run();
 }
 
 }  // namespace launcher