Implement SetViewContents in the client lib

mojo/services/public/interfaces/view_manager/view_manager.mojom

 // Copyright 2014 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.
 
 import "../../../../public/interfaces/geometry/geometry.mojom"
 
 module mojo.view_manager {
 
 struct INode {
   uint32 parent_id;
@@ skipping 67 matching lines @@
   // Deletes the view with the specified id. Only the connection that created
   // the view can delete it.
   DeleteView(uint32 view_id) => (bool success);
 
   // Sets the view a node is showing.
   SetView(uint32 node_id, uint32 view_id) => (bool success);
 
   // Shows the specified image (png encoded) in the specified view.
   SetViewContents(uint32 view_id,
                   handle<shared_buffer> buffer,
-                  uint32 buffer_size);
+                  uint32 buffer_size) => (bool success);
 
   // Sets the ids of the roots for the specified connection.
   // TODO(sky): this is temporary for testing. This needs to be conveyed at
   // creation time of a new connection.
   SetRoots(uint16 connection_id, uint32[] nodes) => (bool success);
 };
 
 // Changes to nodes/views are not sent to the connection that originated the
 // change. For example, if connection 1 attaches a view to a node (SetView())
 // connection 1 does not receive OnNodeViewReplaced().
@@ skipping 34 matching lines @@
 
   // Invoked when the view associated with a node is replaced by another view.
   // 0 is used to identify a null view.
   OnNodeViewReplaced(uint32 node, uint32 new_view_id, uint32 old_view_id);
 
   // Invoked when a view is deleted.
   OnViewDeleted(uint32 view);
 };
 
 }