Draggable region support for frameless app window on CrOS.

ui/views/widget/native_widget_aura.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/views/widget/native_widget_aura.h"
 
 #include "base/bind.h"
 #include "base/string_util.h"
 #include "third_party/skia/include/core/SkRegion.h"
 #include "ui/aura/client/activation_change_observer.h"
@@ skipping 743 matching lines @@
   return cursor_;
 }
 
 int NativeWidgetAura::GetNonClientComponent(const gfx::Point& point) const {
   return delegate_->GetNonClientComponent(point);
 }
 
 bool NativeWidgetAura::ShouldDescendIntoChildForEventHandling(
       aura::Window* child,
       const gfx::Point& location) {
+  views::WidgetDelegate* widget_delegate = GetWidget()->widget_delegate();
+  if (widget_delegate &&
+      !widget_delegate->ShouldDescendIntoChildForEventHandling(child, location))
+    return false;
+
   // Don't descend into |child| if there is a view with a Layer that contains
   // the point and is stacked above |child|s layer.
   typedef std::vector<ui::Layer*> Layers;
   const Layers& root_layers(delegate_->GetRootLayers());
   if (root_layers.empty())
     return true;
 
   Layers::const_iterator child_layer_iter(
       std::find(window_->layer()->children().begin(),
                 window_->layer()->children().end(), child->layer()));
@@ skipping 269 matching lines @@
   return aura::Env::GetInstance()->is_mouse_button_down();
 }
 
 // static
 bool NativeWidgetPrivate::IsTouchDown() {
   return aura::Env::GetInstance()->is_touch_down();
 }
 
 }  // namespace internal
 }  // namespace views