ozone: Map TouchEvent::touch_id_ into expected range

ui/aura/window_event_dispatcher.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_WINDOW_EVENT_DISPATCHER_H_
 #define UI_AURA_WINDOW_EVENT_DISPATCHER_H_
 
+#include <set>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/gtest_prod_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/scoped_observer.h"
 #include "ui/aura/aura_export.h"
@@ skipping 214 matching lines @@
   // the mouse cursor.
   void SynthesizeMouseMoveAfterChangeToWindow(Window* window);
 
   void PreDispatchLocatedEvent(Window* target, ui::LocatedEvent* event);
   void PreDispatchMouseEvent(Window* target, ui::MouseEvent* event);
   void PreDispatchTouchEvent(Window* target, ui::TouchEvent* event);
 
   WindowTreeHost* host_;
 
   // Touch ids that are currently down.
-  uint32 touch_ids_down_;
+  std::set<int> touch_ids_down_;

[spang, 2015/04/13 17:19:54]

std::bitset?

 
   Window* mouse_pressed_handler_;
   Window* mouse_moved_handler_;
   Window* event_dispatch_target_;
   Window* old_dispatch_target_;
 
   bool synthesize_mouse_move_;
 
   // How many move holds are outstanding. We try to defer dispatching
   // touch/mouse moves while the count is > 0.
@@ skipping 14 matching lines @@
 
   // Used to schedule DispatchHeldEvents() when |move_hold_count_| goes to 0.
   base::WeakPtrFactory<WindowEventDispatcher> held_event_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowEventDispatcher);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_WINDOW_EVENT_DISPATCHER_H_