Support GestureBegin and GestureEnd in ui::GestureProvider

content/browser/renderer_host/input/web_input_event_util.cc

 // Copyright 2013 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.
 
 #include "content/browser/renderer_host/input/web_input_event_util.h"
 
 #include "base/strings/string_util.h"
 #include "ui/events/gesture_detection/gesture_event_data.h"
 #include "ui/events/gesture_detection/motion_event.h"
 
@@ skipping 313 matching lines @@
     case ui::ET_GESTURE_TAP_CANCEL:
       gesture.type = WebInputEvent::GestureTapCancel;
       break;
     case ui::ET_GESTURE_TAP_DOWN:
       gesture.type = WebInputEvent::GestureTapDown;
       gesture.data.tapDown.width =
           data.details.bounding_box_f().width() * scale;
       gesture.data.tapDown.height =
           data.details.bounding_box_f().height() * scale;
       break;
+    case ui::ET_GESTURE_BEGIN:

[jdduke (slow), 2014/04/03 20:17:16]

I'd really prefer this  be NOTREACHED(), unless there are many places where Aura
calls into this method.

[tdresser, 2014/04/03 21:14:41]

Done.

+    case ui::ET_GESTURE_END:
+      gesture.type = WebInputEvent::Undefined;
+      break;
     default:
       NOTREACHED() << "ui::EventType provided wasn't a valid gesture event.";
       break;
   }
 
   return gesture;
 }
 
 }  // namespace content