exo: Drop window on touch release

components/exo/shell_surface.cc

Index: components/exo/shell_surface.cc
diff --git a/components/exo/shell_surface.cc b/components/exo/shell_surface.cc
index 565afe40560b9392a8a78bb158febb303d20936b..ea3c4e9a35f049e8fa6f96459e1588ab647ad4dd 100644
--- a/components/exo/shell_surface.cc
+++ b/components/exo/shell_surface.cc
@@ -1118,6 +1118,29 @@ void ShellSurface::OnMouseEvent(ui::MouseEvent* event) {
   }
 }
 
+void ShellSurface::OnGestureEvent(ui::GestureEvent* event) {
+  if (!resizer_) {
+    views::View::OnGestureEvent(event);
+    return;
+  }
+
+  if (event->handled())
+    return;
+
+  switch (event->type()) {
+    case ui::ET_GESTURE_END: {
+      ScopedConfigure scoped_configure(this, false);
+      EndDrag(false /* revert */);
+      break;
+    }
+

[reveman, 2017/06/30 21:48:16]

nit: remove this blank line

[Dominik Laskowski, 2017/06/30 22:27:57]

Done.

+    default:
+      DCHECK_GE(event->type(), ui::ET_GESTURE_TYPE_START);

[reveman, 2017/06/30 21:48:16]

either add all enum values above even if there's a lot of them or switch to a
simple "if (event->type() == ui::ET_GESTURE_END)", the switch statement doesn't
provide any value otherwise imo

[Dominik Laskowski, 2017/06/30 22:27:57]

Done.

+      DCHECK_LE(event->type(), ui::ET_GESTURE_TYPE_END);
+      break;
+  }
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // ui::AcceleratorTarget overrides: