Keep a web dialog window centered over the content area

ui/aura/window.cc

 // Copyright (c) 2012 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 "ui/aura/window.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 52 matching lines @@
       parent_(NULL),
       transient_parent_(NULL),
       visible_(false),
       id_(-1),
       transparent_(false),
       user_data_(NULL),
       ignore_events_(false),
       // Don't notify newly added observers during notification. This causes
       // problems for code that adds an observer as part of an observer
       // notification (such as the workspace code).
-      observers_(ObserverList<WindowObserver>::NOTIFY_EXISTING_ONLY) {
+      observers_(ObserverList<WindowObserver>::NOTIFY_EXISTING_ONLY),
+      is_constrained_window_(false) {
   set_target_handler(delegate_);
 }
 
 Window::~Window() {
   // layer_ can be NULL if Init() wasn't invoked, which can happen
   // only in tests.
   if (layer_)
     layer_->SuppressPaint();
 
   // Let the delegate know we're in the processing of destroying.
@@ skipping 885 matching lines @@
   bool contains_mouse = false;
   if (IsVisible()) {
     RootWindow* root_window = GetRootWindow();
     contains_mouse = root_window &&
         ContainsPointInRoot(root_window->GetLastMouseLocationInRoot());
   }
   return contains_mouse;
 }
 
 }  // namespace aura