Fixed screen capture confirmation dialog to be either system or browser window modal.

ui/wm/core/window_modality_controller.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/wm/core/window_modality_controller.h"
 
 #include <algorithm>
 
 #include "ui/aura/client/aura_constants.h"
 #include "ui/aura/client/capture_client.h"
@@ skipping 166 matching lines @@
   window->RemoveObserver(this);
 }
 
 bool WindowModalityController::ProcessLocatedEvent(aura::Window* target,
                                                    ui::LocatedEvent* event) {
   if (event->handled())
     return false;
   aura::Window* modal_transient_child = GetModalTransient(target);
   if (modal_transient_child && (event->type() == ui::ET_MOUSE_PRESSED ||
                                 event->type() == ui::ET_TOUCH_PRESSED)) {
+    // Activate top window if transient child window is window modal.
+    if (TransientChildIsWindowModal(modal_transient_child)) {
+      aura::Window* toplevel = GetToplevelWindow(target);

[oshima, 2014/04/25 19:06:06]

shouldn't this be modal_transient_child?

[zel, 2014/04/25 20:44:40]

it makes no difference since it boils down to the same object except that this
path requires less window tree traveling when top window is actually |target| 

+      DCHECK(toplevel);
+      ActivateWindow(toplevel);
+    }
+
     AnimateWindow(modal_transient_child, WINDOW_ANIMATION_TYPE_BOUNCE);
   }
   if (event->type() == ui::ET_TOUCH_CANCELLED)
     return false;
   return !!modal_transient_child;
 }
 
 }  // namespace wm