Synthesize ctrl-wheel events on touchpad pinch

content/browser/renderer_host/input/mock_input_ack_handler.h

 // 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.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_INPUT_MOCK_INPUT_ACK_HANDLER_H_
 #define CONTENT_BROWSER_RENDERER_HOST_INPUT_MOCK_INPUT_ACK_HANDLER_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "content/browser/renderer_host/input/input_ack_handler.h"
 
@@ skipping 29 matching lines @@
 
   void set_followup_touch_event(scoped_ptr<TouchEventWithLatencyInfo> event) {
     touch_followup_event_ = event.Pass();
   }
 
   bool unexpected_event_ack_called() const {
     return unexpected_event_ack_called_;
   }
   InputEventAckState ack_state() const { return ack_state_; }
 
+  blink::WebInputEvent::Type ack_event_type() const { return ack_event_type_; }
+
   const NativeWebKeyboardEvent& acked_keyboard_event() const {
     return acked_key_event_;
   }
   const blink::WebMouseWheelEvent& acked_wheel_event() const {
     return acked_wheel_event_;
   }
   const TouchEventWithLatencyInfo& acked_touch_event() const {
     return acked_touch_event_;
   }
   const blink::WebGestureEvent& acked_gesture_event() const {
     return acked_gesture_event_;
   }
 
  private:
-  void RecordAckCalled(InputEventAckState ack_result);
+  void RecordAckCalled(blink::WebInputEvent::Type eventType,
+                       InputEventAckState ack_result);
 
   InputRouter* input_router_;
 
   size_t ack_count_;
   bool unexpected_event_ack_called_;
+  blink::WebInputEvent::Type ack_event_type_;

[jdduke (slow), 2014/05/01 15:44:47]

Initialize in the constructor to |WebInputEvent::Undefined|.

[Rick Byers, 2014/05/01 17:34:57]

Done.

   InputEventAckState ack_state_;
   NativeWebKeyboardEvent acked_key_event_;
   blink::WebMouseWheelEvent acked_wheel_event_;
   TouchEventWithLatencyInfo acked_touch_event_;
   blink::WebGestureEvent acked_gesture_event_;
 
   scoped_ptr<GestureEventWithLatencyInfo> gesture_followup_event_;
   scoped_ptr<TouchEventWithLatencyInfo> touch_followup_event_;
 };
 
 }  // namespace content
 
 #endif // CONTENT_BROWSER_RENDERER_HOST_INPUT_MOCK_INPUT_ACK_HANDLER_H_