Make Mozart view manager use the new compositor.

mojo/services/ui/views/interfaces/view_trees.mojom

 // 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;
 
+import "mojo/public/interfaces/application/service_provider.mojom";
 import "mojo/services/ui/views/interfaces/layouts.mojom";
 import "mojo/services/ui/views/interfaces/views.mojom";
 
+// A view tree token is an opaque transferable reference to a view tree.
+//
+// The ViewManager provides each view tree with a unique view tree token when
+// it is registered.  The token can subsequently be passed to other
+// applications and used as a way to refer to the tree.
+//
+// View tree tokens should be kept secret and should only be shared with
+// trusted services.
+//
+// TODO(jeffbrown): This implementation is a temporary placeholder until
+// we extend Mojo to provide a way to create tokens which cannot be forged.
+struct ViewTreeToken {
+  uint32 value;
+};
+
 // A view tree is a top-level container for a hierarchy of views.
 //
 // A view tree must registered with the view manager before it can be shown.
 interface ViewTree {
   // Called when the tree needs to update its layout.
   //
   // This method may be called for one or more of the following reasons:
   //
   //   1. The root was just set.
   //   2. The root produced different layout information during its last
@@ skipping 18 matching lines @@
   OnRootUnavailable(uint32 root_key) => ();
 };
 
 // The view tree host provides an interface for a view tree to configure itself
 // and interact with its views.
 //
 // Each view tree obtains its own view tree host when registered with the
 // ViewManager.  To unregister the view tree, close its view tree
 // and/or view tree host message pipes.
 interface ViewTreeHost {
+  // Gets a service provider to access services which are associated with
+  // the view tree such as input, accessibility and editing capabilities.
+  // The view tree service provider is private to the view tree and should
+  // not be shared with anyone else.
+  //
+  // See |mojo.ui.InputDispatcher|.
+  GetServiceProvider(mojo.ServiceProvider& service_provider);
+
   // Requests that the view tree's OnLayout() method be called to compute a
   // new layout due to a change in the view tree's layout information.
   RequestLayout();
 
   // Sets the root of the view tree and assigns it the provided |root_key|
   // to distinguish it from any other roots this view tree has had.
   //
   // It is a good idea to provide a distinct |root_key| each time a new root
   // is set so that callbacks related to the root can be clearly distinguished
   // across these changes.
@@ skipping 24 matching lines @@
   // or because the root has become unavailable.
   //
   // It is an error to call this function if the view tree does not currently
   // have a root; the connection will be closed.
   //
   // It is an error to specify malformed |root_layout_params| such
   // as invalid size constraints; the connection will be closed.
   LayoutRoot(mojo.ui.ViewLayoutParams root_layout_params) =>
       (mojo.ui.ViewLayoutInfo? info);
 };