Draggable region support for frameless app window on CrOS.

ui/aura/root_window.cc

Index: ui/aura/root_window.cc
diff --git a/ui/aura/root_window.cc b/ui/aura/root_window.cc
index 57b96684bd41fa2872f5ac1ea2fbfa05bda83ffa..d34a20a3177cfcfb0bee5b1cdfc89c03604a28f3 100644
--- a/ui/aura/root_window.cc
+++ b/ui/aura/root_window.cc
@@ -823,7 +823,7 @@ bool RootWindow::OnHostScrollEvent(ui::ScrollEvent* event) {
   Window* target = mouse_pressed_handler_ ?
       mouse_pressed_handler_ : client::GetCaptureWindow(this);
   if (!target)
-    target = GetEventHandlerForPoint(event->location());
+    target = GetEventHandlerForPoint(event->location(), event->type());
 
   if (target && target->delegate()) {
     int flags = event->flags();
@@ -880,7 +880,7 @@ bool RootWindow::OnHostTouchEvent(ui::TouchEvent* event) {
   } else {
     // We only come here when the first contact was within the root window.
     if (!target) {
-      target = GetEventHandlerForPoint(event->location());
+      target = GetEventHandlerForPoint(event->location(), event->type());
       if (!target)
         return false;
     }
@@ -950,7 +950,7 @@ bool RootWindow::DispatchMouseEventImpl(ui::MouseEvent* event) {
   Window* target = mouse_pressed_handler_ ?
       mouse_pressed_handler_ : client::GetCaptureWindow(this);
   if (!target)
-    target = GetEventHandlerForPoint(event->location());
+    target = GetEventHandlerForPoint(event->location(), event->type());
   return DispatchMouseEventToTarget(event, target);
 }