Make Mozart view manager use the new compositor.

mojo/services/ui/input/interfaces/input_connection.mojom

Index: mojo/services/ui/input/interfaces/input_connection.mojom
diff --git a/mojo/services/ui/input/interfaces/input_connection.mojom b/mojo/services/ui/input/interfaces/input_connection.mojom
new file mode 100644
index 0000000000000000000000000000000000000000..c9370fb8de056a60c9fc919fb4f3d59e540d3dd3
--- /dev/null
+++ b/mojo/services/ui/input/interfaces/input_connection.mojom
@@ -0,0 +1,35 @@
+// Copyright 2015 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.
+
+[DartPackage="mojo_services"]
+module mojo.ui;
+
+// TODO(jeffbrown): Redesign input event representation later.
+import "mojo/services/input_events/interfaces/input_events.mojom";
+
+// The input connection service allows a view to receive input events
+// such as key presses and pointer movements.
+
+// This service can be retrieved from the |ViewHost| service provider.
+//
+// TODO(jeffbrown): Elaborate this.  Particularly need to think about
+// how to handle focus and gestures.
+[ServiceName="mojo::ui::InputConnection"]
+interface InputConnection {
+  // Sets the listener for receiving input events.
+  //
+  // If |listener| is null, then the previously set listener is removed.
+  SetListener(InputListener? listener);
+};
+
+// An interface applications may implement to receive events from an
+// input connection.
+interface InputListener {
+  // Called to deliver an input event.
+  //
+  // The |handled| result should indicate whether the input event was
+  // consumed by the connection.  If |handled| is false, the system may
+  // apply default behavior of its own in response to the event.
+  OnEvent(mojo.Event event) => (bool handled);

[abarth, 2016/01/10 01:42:54]

I'd rename "handled" to "consumed" because that's what your comment says.  Other
systems have a tri-state result from event dispatching (i.e., ignored,
processed, and consumed) but we might not need that here.

[jeffbrown, 2016/01/26 05:59:12]

Done.

+};