Synthesize ctrl-wheel events on touchpad pinch

content/common/input/synthetic_web_input_event_builders.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/common/input/synthetic_web_input_event_builders.h"
 
 #include "base/logging.h"
 #include "content/common/input/web_touch_event_traits.h"
 #include "ui/events/keycodes/keyboard_codes.h"
 
@@ skipping 105 matching lines @@
   result.data.scrollUpdate.deltaX = dx;
   result.data.scrollUpdate.deltaY = dy;
   result.modifiers = modifiers;
   return result;
 }
 
 WebGestureEvent SyntheticWebGestureEventBuilder::BuildPinchUpdate(
     float scale,
     float anchor_x,
     float anchor_y,
-    int modifiers) {
-  WebGestureEvent result = Build(WebInputEvent::GesturePinchUpdate,
-                                 WebGestureEvent::Touchscreen);
+    int modifiers,
+    WebGestureEvent::SourceDevice source_device) {
+  WebGestureEvent result =
+      Build(WebInputEvent::GesturePinchUpdate, source_device);
   result.data.pinchUpdate.scale = scale;
   result.x = anchor_x;
   result.y = anchor_y;
+  result.globalX = anchor_x;
+  result.globalY = anchor_y;
   result.modifiers = modifiers;
   return result;
 }
 
 WebGestureEvent SyntheticWebGestureEventBuilder::BuildFling(
     float velocity_x,
     float velocity_y,
     WebGestureEvent::SourceDevice source_device) {
   WebGestureEvent result = Build(WebInputEvent::GestureFlingStart,
                                  source_device);
@@ skipping 55 matching lines @@
   touches[index].state = WebTouchPoint::StateCancelled;
   WebTouchEventTraits::ResetType(
       WebInputEvent::TouchCancel, timeStampSeconds, this);
 }
 
 void SyntheticWebTouchEvent::SetTimestamp(base::TimeDelta timestamp) {
   timeStampSeconds = timestamp.InSecondsF();
 }
 
 }  // namespace content