ozone: events: Centralize & document our NativeEvent woes

ui/ozone/platform/caca/caca_window.cc

Index: ui/ozone/platform/caca/caca_window.cc
diff --git a/ui/ozone/platform/caca/caca_window.cc b/ui/ozone/platform/caca/caca_window.cc
index 03a8ce31688f86d5358c61d9a6ed422431814eb4..ff2f5716e34bd1b9778cebcb54b894816c7c19e2 100644
--- a/ui/ozone/platform/caca/caca_window.cc
+++ b/ui/ozone/platform/caca/caca_window.cc
@@ -8,6 +8,7 @@
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
+#include "ui/events/ozone/events_ozone.h"
 #include "ui/events/platform/platform_event_source.h"
 #include "ui/ozone/platform/caca/caca_event_source.h"
 #include "ui/ozone/platform/caca/caca_window_manager.h"
@@ -102,7 +103,10 @@ void CacaWindow::OnCacaQuit() {
 
 
 void CacaWindow::OnCacaEvent(ui::Event* event) {
-  delegate_->DispatchEvent(event);
+  DispatchEventFromNativeUiEvent(
+      event,
+      base::Bind(&PlatformWindowDelegate::DispatchEvent,
+                 base::Unretained(delegate_)));
 }
 
 gfx::Rect CacaWindow::GetBounds() { return gfx::Rect(bitmap_size_); }