Plumb ViewportMetrics change notifications around the world and back.

services/view_manager/display_manager.cc

 // 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.
 
 #include "services/view_manager/display_manager.h"
 
 #include "base/numerics/safe_conversions.h"
 #include "cc/surfaces/surface_id_allocator.h"
 #include "mojo/converters/geometry/geometry_type_converters.h"
 #include "mojo/converters/surfaces/surfaces_type_converters.h"
@@ skipping 155 matching lines @@
   native_viewport_->SubmittedFrame(qualified_id.Pass());
 }
 
 void DefaultDisplayManager::OnDestroyed() {
   // This is called when the native_viewport is torn down before
   // ~DefaultDisplayManager may be called.
   native_viewport_closed_callback_.Run();
 }
 
 void DefaultDisplayManager::OnMetricsChanged(mojo::ViewportMetricsPtr metrics) {
-  metrics_.size = metrics->size.Pass();
+  metrics_.size = metrics->size.Clone();
   metrics_.device_pixel_ratio = metrics->device_pixel_ratio;
   gfx::Rect bounds(metrics_.size.To<gfx::Size>());
   connection_manager_->root()->SetBounds(bounds);
+  connection_manager_->ProcessViewportMetricsChanged(metrics_, *metrics);
   if (!surface_allocated_)
     return;
   surface_->DestroySurface(kLocalSurfaceID);
   surface_allocated_ = false;
   SchedulePaint(connection_manager_->root(), bounds);
 }
 
 void DefaultDisplayManager::SetIdNamespace(uint32_t id_namespace) {
   id_namespace_ = id_namespace;
   if (surface_allocated_) {
     auto qualified_id = mojo::SurfaceId::New();
     qualified_id->id_namespace = id_namespace_;
     qualified_id->local = kLocalSurfaceID;
     native_viewport_->SubmittedFrame(qualified_id.Pass());
   }
 }
 
 void DefaultDisplayManager::ReturnResources(
     mojo::Array<mojo::ReturnedResourcePtr> resources) {
   DCHECK_EQ(0u, resources.size());
 }
 
 }  // namespace view_manager