DesktopAura: Track windows "owned" via the DesktopWindowTreeHost

ui/views/widget/native_widget_mac.mm

 // 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 "ui/views/widget/native_widget_mac.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include <utility>
 
@@ skipping 591 matching lines @@
 }
 
 void NativeWidgetMac::RepostNativeEvent(gfx::NativeEvent native_event) {
   NOTIMPLEMENTED();
 }
 
 std::string NativeWidgetMac::GetName() const {
   return name_;
 }
 
+Widget::Widgets NativeWidgetMac::GetAllOwnedTopLevelWidgets() const {
+  return Widget::Widgets();
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // NativeWidgetMac, protected:
 
 NativeWidgetMacNSWindow* NativeWidgetMac::CreateNSWindow(
     const Widget::InitParams& params) {
   return [[[NativeWidgetMacNSWindow alloc]
       initWithContentRect:ui::kWindowSizeDeterminedLater
                 styleMask:StyleMaskForParams(params)
                   backing:NSBackingStoreBuffered
                     defer:NO] autorelease];
@@ skipping 98 matching lines @@
   // When the NSWindow *is* a Widget, only consider child_windows(). I.e. do not
   // look through -[NSWindow childWindows] as done for the (!bridge) case above.
   // -childWindows does not support hidden windows, and anything in there which
   // is not in child_windows() would have been added by AppKit.
   for (BridgedNativeWidget* child : bridge->child_windows())
     GetAllChildWidgets(child->ns_view(), children);
 }
 
 // static
 void NativeWidgetPrivate::GetAllOwnedWidgets(gfx::NativeView native_view,
-                                             Widget::Widgets* owned) {
+                                             Widget::Widgets* owned,
+                                             bool include_toplevel) {
+  // All Widgets are toplevel on Mac.
+  if (!include_toplevel)
+    return;
+
   BridgedNativeWidget* bridge =
       NativeWidgetMac::GetBridgeForNativeWindow([native_view window]);
   if (!bridge) {
     GetAllChildWidgets(native_view, owned);
     return;
   }
   if (bridge->ns_view() != native_view)
     return;
   for (BridgedNativeWidget* child : bridge->child_windows())
     GetAllChildWidgets(child->ns_view(), owned);
@@ skipping 50 matching lines @@
   [[ViewsNSWindowCloseAnimator alloc] initWithWindow:window];
 }
 
 - (void)animationDidEnd:(NSAnimation*)animation {
   [window_ close];
   [animation_ setDelegate:nil];
   [self release];
 }
 
 @end