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 742 matching lines @@
 gfx::NativeCursor NativeWidgetAura::GetCursor(const gfx::Point& point) {
   return cursor_;
 }
 
 int NativeWidgetAura::GetNonClientComponent(const gfx::Point& point) const {
   return delegate_->GetNonClientComponent(point);
 }
 
 bool NativeWidgetAura::ShouldDescendIntoChildForEventHandling(
       aura::Window* child,
-      const gfx::Point& location) {
+      const gfx::Point& event_location,
+      ui::EventType event_type) {
+  views::WidgetDelegate* widget_delegate = GetWidget()->widget_delegate();
+  if (widget_delegate &&
+      !widget_delegate->ShouldDescendIntoChildForEventHandling(
+            child, event_location, event_type))
+    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()));
   if (child_layer_iter == window_->layer()->children().end())
     return true;
 
   for (std::vector<ui::Layer*>::const_reverse_iterator i = root_layers.rbegin();
        i != root_layers.rend(); ++i) {
     ui::Layer* layer = *i;
-    if (layer->visible() && layer->bounds().Contains(location)) {
+    if (layer->visible() && layer->bounds().Contains(event_location)) {
       Layers::const_iterator root_layer_iter(
           std::find(window_->layer()->children().begin(),
                     window_->layer()->children().end(), layer));
       if (root_layer_iter > child_layer_iter)
         return false;
     }
   }
   return true;
 }
 
@@ skipping 252 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