Synthesize ctrl-wheel events on touchpad pinch

content/browser/renderer_host/render_widget_host_unittest.cc

 // Copyright (c) 2012 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 "base/basictypes.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/shared_memory.h"
 #include "base/timer/timer.h"
@@ skipping 724 matching lines @@
 
   void SimulateGestureScrollUpdateEvent(float dX, float dY, int modifiers) {
     SimulateGestureEventCore(
         SyntheticWebGestureEventBuilder::BuildScrollUpdate(dX, dY, modifiers));
   }
 
   void SimulateGesturePinchUpdateEvent(float scale,
                                        float anchorX,
                                        float anchorY,
                                        int modifiers) {
-    SimulateGestureEventCore(
-        SyntheticWebGestureEventBuilder::BuildPinchUpdate(scale,
-                                                          anchorX,
-                                                          anchorY,
-                                                          modifiers));
+    SimulateGestureEventCore(SyntheticWebGestureEventBuilder::BuildPinchUpdate(
+        scale, anchorX, anchorY, modifiers, WebGestureEvent::Touchscreen));
   }
 
   // Inject synthetic GestureFlingStart events.
   void SimulateGestureFlingStartEvent(
       float velocityX,
       float velocityY,
       WebGestureEvent::SourceDevice sourceDevice) {
     SimulateGestureEventCore(
         SyntheticWebGestureEventBuilder::BuildFling(velocityX,
                                                     velocityY,
@@ skipping 1919 matching lines @@
 
   // Tests RWHI::ForwardTouchEventWithLatencyInfo().
   PressTouchPoint(0, 1);
   SendTouchEvent();
   CheckLatencyInfoComponentInMessage(
       process_, GetLatencyComponentId(), WebInputEvent::TouchStart);
   SendInputEventACK(WebInputEvent::TouchStart, INPUT_EVENT_ACK_STATE_CONSUMED);
 }
 
 }  // namespace content