Provide access to the WindowEventDispatcher as a ui::EventProcessor.

ash/test/ash_test_base.cc

Index: ash/test/ash_test_base.cc
diff --git a/ash/test/ash_test_base.cc b/ash/test/ash_test_base.cc
index ecc1e8fa2c687e35e977dda7d4e59206b3790c27..9c9cbe30b8c1214bc2ff187cf041d6a78d4a073f 100644
--- a/ash/test/ash_test_base.cc
+++ b/ash/test/ash_test_base.cc
@@ -58,12 +58,12 @@ class AshEventGeneratorDelegate : public aura::test::EventGeneratorDelegate {
   virtual ~AshEventGeneratorDelegate() {}
 
   // aura::test::EventGeneratorDelegate overrides:
-  virtual aura::WindowEventDispatcher* GetDispatcherAt(
+  virtual aura::WindowTreeHost* GetHostAt(
       const gfx::Point& point_in_screen) const OVERRIDE {
     gfx::Screen* screen = Shell::GetScreen();
     gfx::Display display = screen->GetDisplayNearestPoint(point_in_screen);
     return Shell::GetInstance()->display_controller()->
-        GetRootWindowForDisplayId(display.id())->GetHost()->dispatcher();
+        GetRootWindowForDisplayId(display.id())->GetHost();
   }
 
   virtual aura::client::ScreenPositionClient* GetScreenPositionClient(