Plumb ViewportMetrics change notifications around the world and back.

services/view_manager/connection_manager.h

 // 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.
 
 #ifndef SERVICES_VIEW_MANAGER_CONNECTION_MANAGER_H_
 #define SERVICES_VIEW_MANAGER_CONNECTION_MANAGER_H_
 
 #include <map>
 #include <set>
 
@@ skipping 112 matching lines @@
 
   // WindowManagerInternalClient implementation helper; see mojom for details.
   bool CloneAndAnimate(const ViewId& view_id);
 
   // These functions trivially delegate to all ViewManagerServiceImpls, which in
   // term notify their clients.
   void ProcessViewDestroyed(ServerView* view);
   void ProcessViewBoundsChanged(const ServerView* view,
                                 const gfx::Rect& old_bounds,
                                 const gfx::Rect& new_bounds);
+  void ProcessViewportMetricsChanged(const ServerView* view,

[sky, 2015/01/27 16:35:08]

Did you finish wiring this all up? AFAICT this isn't invoked.

How do you plan on invoking this? For all views? Only for the root?

[eseidel, 2015/01/27 18:50:04]

No, the wiring isn't finished.  I figured all views (since they can be owned by
separate applications, no?)  Unless you think views should be responsible for
telling their children.

+                                     const mojo::ViewportMetrics& old_metrics,
+                                     const mojo::ViewportMetrics& new_metrics);
   void ProcessWillChangeViewHierarchy(const ServerView* view,
                                       const ServerView* new_parent,
                                       const ServerView* old_parent);
   void ProcessViewHierarchyChanged(const ServerView* view,
                                    const ServerView* new_parent,
                                    const ServerView* old_parent);
   void ProcessViewReorder(const ServerView* view,
                           const ServerView* relative_view,
                           const mojo::OrderDirection direction);
   void ProcessViewDeleted(const ViewId& view);
@@ skipping 82 matching lines @@
   base::RepeatingTimer<ConnectionManager> animation_timer_;
 
   AnimationRunner animation_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(ConnectionManager);
 };
 
 }  // namespace view_manager
 
 #endif  // SERVICES_VIEW_MANAGER_CONNECTION_MANAGER_H_