aura: Start using EventPrcessor interface for event dispatch.

ui/aura/window_targeter.h

Index: ui/aura/window_targeter.h
diff --git a/ui/aura/window_targeter.h b/ui/aura/window_targeter.h
index ba69ed88819d4eeeea23e5b53fb46cdcb55baff0..4457f77c3717b344cba8f444090c2ae08bdb1540 100644
--- a/ui/aura/window_targeter.h
+++ b/ui/aura/window_targeter.h
@@ -6,6 +6,8 @@
 
 namespace aura {
 
+class Window;
+
 class WindowTargeter : public ui::EventTargeter {
  public:
   WindowTargeter();
@@ -15,10 +17,17 @@ class WindowTargeter : public ui::EventTargeter {
   // ui::EventTargeter:
   virtual ui::EventTarget* FindTargetForEvent(ui::EventTarget* root,
                                               ui::Event* event) OVERRIDE;
+  virtual ui::EventTarget* FindTargetForLocatedEvent(
+      ui::EventTarget* root,
+      ui::LocatedEvent* event) OVERRIDE;
   virtual bool SubtreeShouldBeExploredForEvent(
       ui::EventTarget* target,
       const ui::LocatedEvent& event) OVERRIDE;
 
+ private:
+  Window* FindTargetInRootWindow(Window* root_window,
+                                 const ui::LocatedEvent& event);
+
   DISALLOW_COPY_AND_ASSIGN(WindowTargeter);
 };