WebMouseEvent coordinates are now fractional & private

content/browser/renderer_host/input/web_input_event_builders_mac.mm

 // Copyright 2015 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.
 
 /*
  * Copyright (C) 2004, 2006, 2007 Apple Inc. All rights reserved.
  * Copyright (C) 2006-2009 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ skipping 489 matching lines @@
 }
 
 blink::WebGestureEvent WebGestureEventBuilder::Build(NSEvent* event,
                                                      NSView* view) {
   blink::WebGestureEvent result;
 
   // Use a temporary WebMouseEvent to get the location.
   blink::WebMouseEvent temp;
 
   SetWebEventLocationFromEventInView(&temp, event, view);
-  result.x = temp.x;
-  result.y = temp.y;
-  result.globalX = temp.globalX;
-  result.globalY = temp.globalY;
+  result.x = temp.positionInWidget().x;

[dtapuska, 2017/03/31 14:04:18]

We should probably fix WebGestureEvent next eh?

[mustaq, 2017/03/31 15:50:31]

Added a TODO in WebGestureEvent.h .

+  result.y = temp.positionInWidget().y;
+  result.globalX = temp.positionInScreen().x;
+  result.globalY = temp.positionInScreen().y;
 
   result.setModifiers(ModifiersFromEvent(event));
   result.setTimeStampSeconds([event timestamp]);
 
   result.sourceDevice = blink::WebGestureDeviceTouchpad;
   switch ([event type]) {
     case NSEventTypeMagnify:
       result.setType(blink::WebInputEvent::GesturePinchUpdate);
       result.data.pinchUpdate.scale = [event magnification] + 1.0;
       break;
@@ skipping 12 matching lines @@
       // to specify them when the gesture is differentiated.
       break;
     default:
       NOTIMPLEMENTED();
   }
 
   return result;
 }
 
 }  // namespace content