Fully support the autohide shelf option for touch UI on Windows.

ui/aura/test/event_generator.h

 // Copyright (c) 2012 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_H_
 #define UI_AURA_TEST_EVENT_GENERATOR_H_
 
 #include <list>
 #include <vector>
 
@@ skipping 196 matching lines @@
   }
 
   void PressMoveAndReleaseTouchBy(int x, int y) {
     PressMoveAndReleaseTouchTo(current_location_ + gfx::Vector2d(x, y));
   }
 
   // Generates press, move and release events to move touch
   // to the center of the window.
   void PressMoveAndReleaseTouchToCenterOf(Window* window);
 
+  // Generates and dispatches a Win8 edge-swipe event (swipe up from bottom or
+  // swipe down from top).  Note that it is not possible to distinguish between
+  // the two edges with this event.
+  void GestureEdgeSwipe();
+
   // Generates and dispatches touch-events required to generate a TAP gesture.
   // Note that this can generate a number of other gesture events at the same
   // time (e.g. GESTURE_BEGIN, TAP_DOWN, END).
   void GestureTapAt(const gfx::Point& point);
 
   // Generates press and release touch-events to generate a TAP_DOWN event, but
   // without generating any scroll or tap events. This can also generate a few
   // other gesture events (e.g. GESTURE_BEGIN, END).
   void GestureTapDownAndUp(const gfx::Point& point);
 
@@ skipping 116 matching lines @@
   // Set to true to cause events to be posted asynchronously.
   bool async_;
 
   DISALLOW_COPY_AND_ASSIGN(EventGenerator);
 };
 
 }  // namespace test
 }  // namespace aura
 
 #endif  // UI_AURA_TEST_EVENT_GENERATOR_H_