Wire input events through the ViewManagerClient interface.

mojo/services/view_manager/node_delegate.h

Index: mojo/services/view_manager/node_delegate.h
diff --git a/mojo/services/view_manager/node_delegate.h b/mojo/services/view_manager/node_delegate.h
index 1079dd88cacf9b99fe567c928f9e4eecdf516dd3..d63acc91998842d8bcca105d217181fde2df0f0a 100644
--- a/mojo/services/view_manager/node_delegate.h
+++ b/mojo/services/view_manager/node_delegate.h
@@ -7,6 +7,10 @@
 
 #include "mojo/services/view_manager/view_manager_export.h"
 
+namespace ui {
+class Event;
+}
+
 namespace mojo {
 namespace view_manager {
 namespace service {
@@ -26,6 +30,10 @@ class MOJO_VIEW_MANAGER_EXPORT NodeDelegate {
                                   const View* new_view,
                                   const View* old_view) = 0;
 
+  // Invoked when an input event is received by the View at this node.
+  virtual void OnViewInputEvent(const View* view,
+                                const ui::Event* event) = 0;
+
  protected:
   virtual ~NodeDelegate() {}
 };