Get event targetting working for mouse events.

examples/window_manager/window_manager.cc

Index: examples/window_manager/window_manager.cc
diff --git a/examples/window_manager/window_manager.cc b/examples/window_manager/window_manager.cc
index 90c63d21fed5fd215e03b0801f4ec2eb5dd42cb0..7069d6521e670c48a07483d0295a0146f70f6150 100644
--- a/examples/window_manager/window_manager.cc
+++ b/examples/window_manager/window_manager.cc
@@ -396,8 +396,7 @@ class WindowManager
 
   // Overridden from ui::EventHandler:
   virtual void OnEvent(ui::Event* event) override {
-    View* view = WindowManagerApp::GetViewForViewTarget(
-        static_cast<ViewTarget*>(event->target()));
+    View* view = static_cast<ViewTarget*>(event->target())->view();
     if (event->type() == ui::ET_MOUSE_PRESSED &&
         !IsDescendantOfKeyboard(view)) {
       view->SetFocus();