Plumb gesture source value through Blink.

third_party/WebKit/Source/web/WebInputEventConversion.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 236 matching lines @@
         m_type = PlatformEvent::GesturePinchUpdate;
         m_data.m_pinchUpdate.m_scale = e.data.pinchUpdate.scale;
         break;
     default:
         ASSERT_NOT_REACHED();
     }
     m_position = widget->convertFromContainingWindow(flooredIntPoint(convertHitPointToWindow(widget, FloatPoint(e.x, e.y))));
     m_globalPosition = IntPoint(e.globalX, e.globalY);
     m_timestamp = e.timeStampSeconds;
     m_modifiers = e.modifiers;
+    switch (e.sourceDevice) {
+    case WebGestureDeviceUninitialized:

[tdresser, 2015/10/19 12:52:39]

Let's put the exceptional case at the end.

[wjmaclean, 2015/10/19 15:26:55]

Done.

+        ASSERT_NOT_REACHED();
+        break;
+    case WebGestureDeviceTouchpad:
+        m_source = PlatformGestureSourceTouchpad;
+        break;
+    case WebGestureDeviceTouchscreen:
+        m_source = PlatformGestureSourceTouchscreen;
+    }
 }
 
 // MakePlatformKeyboardEvent --------------------------------------------------
 
 inline PlatformEvent::Type toPlatformKeyboardEventType(WebInputEvent::Type type)
 {
     switch (type) {
     case WebInputEvent::KeyUp:
         return PlatformEvent::KeyUp;
     case WebInputEvent::KeyDown:
@@ skipping 430 matching lines @@
     }
 
     timeStampSeconds = convertDOMTimeStampToSeconds(event.createTime());
     modifiers = event.modifiers();
 
     globalX = event.screenX();
     globalY = event.screenY();
     IntPoint localPoint = convertAbsoluteLocationForLayoutObject(event.absoluteLocation(), *layoutObject);
     x = localPoint.x();
     y = localPoint.y();
+
+    switch (event.source()) {
+    case GestureSourceUninitialized:

[tdresser, 2015/10/19 12:52:39]

ditto

[wjmaclean, 2015/10/19 15:26:55]

Done.

+        ASSERT_NOT_REACHED();
+        break;
+    case GestureSourceTouchpad:
+        sourceDevice = WebGestureDeviceTouchpad;
+        break;
+    case GestureSourceTouchscreen:
+        sourceDevice = WebGestureDeviceTouchscreen;
+    }
 }
 
 } // namespace blink