events: Clean up dispatching code for touch-events.

ui/views/widget/desktop_native_widget_aura.cc

Index: ui/views/widget/desktop_native_widget_aura.cc
diff --git a/ui/views/widget/desktop_native_widget_aura.cc b/ui/views/widget/desktop_native_widget_aura.cc
index 7d36459b8757f53a79898c95cd7e831538040005..e3c38f42cb651abc2c3a5e233985f6ac08f44d7a 100644
--- a/ui/views/widget/desktop_native_widget_aura.cc
+++ b/ui/views/widget/desktop_native_widget_aura.cc
@@ -436,8 +436,24 @@ ui::EventResult DesktopNativeWidgetAura::OnMouseEvent(ui::MouseEvent* event) {
       ui::ER_HANDLED : ui::ER_UNHANDLED;
 }
 
-ui::TouchStatus DesktopNativeWidgetAura::OnTouchEvent(ui::TouchEvent* event) {
-  return native_widget_delegate_->OnTouchEvent(*event);
+ui::EventResult DesktopNativeWidgetAura::OnTouchEvent(ui::TouchEvent* event) {
+  ui::TouchStatus status = native_widget_delegate_->OnTouchEvent(*event);
+  switch (status) {
+    case ui::TOUCH_STATUS_UNKNOWN:

[Ben Goodger (Google), 2012/09/26 19:42:48]

should you have a function in ui/base/events that has this switch statement?
i've seen it a couple of times in this cl.

[sadrul, 2012/09/26 21:26:05]

Done.

+      return ui::ER_UNHANDLED;
+
+    case ui::TOUCH_STATUS_START:
+    case ui::TOUCH_STATUS_CONTINUE:
+    case ui::TOUCH_STATUS_END:
+      return ui::ER_CONSUMED;
+
+    case ui::TOUCH_STATUS_QUEUED:
+    case ui::TOUCH_STATUS_QUEUED_END:
+      return ui::ER_ASYNC;
+  }
+
+  NOTREACHED();
+  return ui::ER_UNHANDLED;
 }
 
 ui::EventResult DesktopNativeWidgetAura::OnGestureEvent(