Plumb ViewportMetrics change notifications around the world and back.

services/view_manager/server_view.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/server_view.h"
 
 #include <inttypes.h>
 
 #include "base/strings/stringprintf.h"
 #include "services/view_manager/server_view_delegate.h"
 
 namespace view_manager {
 
+namespace {
+
+mojo::ViewportMetricsPtr CreateEmptyViewportMetrics() {
+  mojo::ViewportMetricsPtr metrics = mojo::ViewportMetrics::New();
+  metrics->size = mojo::Size::New();
+  return metrics;
+}
+}
+
 ServerView::ServerView(ServerViewDelegate* delegate, const ViewId& id)
     : delegate_(delegate),
       id_(id),
       parent_(nullptr),
       visible_(false),
+      viewport_metrics_(CreateEmptyViewportMetrics()),
       opacity_(1) {
   DCHECK(delegate);  // Must provide a delegate.
 }
 
 ServerView::~ServerView() {
   delegate_->OnWillDestroyView(this);
 
   while (!children_.empty())
     children_.front()->parent()->Remove(children_.front());
 
@@ skipping 57 matching lines @@
 
 void ServerView::SetBounds(const gfx::Rect& bounds) {
   if (bounds_ == bounds)
     return;
 
   const gfx::Rect old_bounds = bounds_;
   bounds_ = bounds;
   delegate_->OnViewBoundsChanged(this, old_bounds, bounds);
 }
 
+void ServerView::SetViewportMetrics(const mojo::ViewportMetrics& metrics) {
+  if (viewport_metrics_->Equals(metrics))
+    return;
+
+  viewport_metrics_ = metrics.Clone();
+  delegate_->OnViewViewportMetricsChanged(this, *viewport_metrics_, metrics);
+  for (size_t i = 0; i < children_.size(); ++i)

[eseidel, 2015/01/27 22:46:58]

Unknown if this is needed or not.

+    children_[i]->SetViewportMetrics(metrics);
+}
+
 const ServerView* ServerView::GetRoot() const {
   const ServerView* view = this;
   while (view && view->parent())
     view = view->parent();
   return view;
 }
 
 std::vector<const ServerView*> ServerView::GetChildren() const {
   std::vector<const ServerView*> children;
   children.reserve(children_.size());
@@ skipping 91 matching lines @@
     child->BuildDebugInfo(depth + "  ", result);
 }
 #endif
 
 void ServerView::RemoveImpl(ServerView* view) {
   view->parent_ = NULL;
   children_.erase(std::find(children_.begin(), children_.end(), view));
 }
 
 }  // namespace view_manager