Don't pass touches to gesture recognizer for async acks.

ui/aura/test/aura_test_utils.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_AURA_TEST_UTILS_H_
 #define UI_AURA_TEST_AURA_TEST_UTILS_H_
 
 #include "base/macros.h"
 
+#include "ui/aura/window_event_dispatcher.h"
+
 namespace gfx {
 class Point;
 }
 
 namespace aura {
 class WindowTreeHost;
 
 namespace test {
 
+class WindowTreeHostTestApi {
+ public:
+  explicit WindowTreeHostTestApi(WindowTreeHost* host);
+  const gfx::Point& last_cursor_request_position_in_host();
+  void set_dispatcher(WindowEventDispatcher* dispatcher);
+
+ private:
+  WindowTreeHost* host_;
+
+  DISALLOW_COPY_AND_ASSIGN(WindowTreeHostTestApi);
+};
+
 const gfx::Point& QueryLatestMousePositionRequestInHost(WindowTreeHost* host);
 
 }  // namespace test
 }  // namespace aura
 
 #endif  // UI_AURA_TEST_AURA_TEST_UTILS_H_