Get event targetting working for mouse events.

mojo/services/window_manager/view_targeter.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MOJO_SERVICES_WINDOW_MANAGER_VIEW_TARGETER_H_
 #define MOJO_SERVICES_WINDOW_MANAGER_VIEW_TARGETER_H_
 
 #include "ui/events/event_targeter.h"
 
 namespace mojo {
 
+class ViewTarget;
+
 class ViewTargeter : public ui::EventTargeter {
  public:
   ViewTargeter();
   ~ViewTargeter() override;
 
+ protected:
+  // ui::EventTargeter:
+  ui::EventTarget* FindTargetForEvent(ui::EventTarget* root,
+                                      ui::Event* event) override;
+  ui::EventTarget* FindTargetForLocatedEvent(
+      ui::EventTarget* root,
+      ui::LocatedEvent* event) override;
+  bool SubtreeCanAcceptEvent(
+      ui::EventTarget* target,
+      const ui::LocatedEvent& event) const override;
+  bool EventLocationInsideBounds(
+      ui::EventTarget* target,
+      const ui::LocatedEvent& event) const override;
+
  private:
+  // Deals with cases where a the |root_view| needs to change how things are
+  // dispatched. (For example, in the case of capture.)
+  ViewTarget* FindTargetInRootView(ViewTarget* root_view,
+                                   const ui::LocatedEvent& event);
+
+
   DISALLOW_COPY_AND_ASSIGN(ViewTargeter);
 };
 
 }  // namespace mojo
 
 #endif  // MOJO_SERVICES_WINDOW_MANAGER_VIEW_TARGETER_H_