Make ui::test::EventGenerator work with PointerEvents in mash

ui/aura/test/event_generator_delegate_aura.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 UI_AURA_TEST_EVENT_GENERATOR_DELEGATE_AURA_H_
 #define UI_AURA_TEST_EVENT_GENERATOR_DELEGATE_AURA_H_
 
 #include "base/macros.h"
 #include "ui/events/test/event_generator.h"
 
@@ skipping 30 matching lines @@
   gfx::Point CenterOfTarget(const ui::EventTarget* target) const override;
   gfx::Point CenterOfWindow(gfx::NativeWindow window) const override;
   void ConvertPointFromTarget(const ui::EventTarget* target,
                               gfx::Point* point) const override;
   void ConvertPointToTarget(const ui::EventTarget* target,
                             gfx::Point* point) const override;
   void ConvertPointFromHost(const ui::EventTarget* hosted_target,
                             gfx::Point* point) const override;
   void DispatchKeyEventToIME(ui::EventTarget* target,
                              ui::KeyEvent* event) override;
+  void DispatchEventToPointerWatchers(ui::EventTarget* target,
+                                      const ui::PointerEvent& event) override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(EventGeneratorDelegateAura);
 };
 
 }  // namespace test
 }  // namespace aura
 
 #endif  // UI_AURA_TEST_EVENT_GENERATOR_DELEGATE_AURA_H_