Plumb gesture source value through Blink.

components/test_runner/event_sender.cc

 // Copyright 2014 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 "components/test_runner/event_sender.h"
 
 #include "base/basictypes.h"
 #include "base/logging.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
@@ skipping 1639 matching lines @@
       break;
     }
   }
   delegate_->PrintMessage(std::string("Filename being dragged: ") +
                           filename.utf8().data() + "\n");
 }
 
 void EventSender::GestureFlingCancel() {
   WebGestureEvent event;
   event.type = WebInputEvent::GestureFlingCancel;
+  event.sourceDevice = blink::WebGestureDeviceTouchpad;

[tdresser, 2015/10/14 17:18:56]

In an ideal world I think we'd have GestureFlingCancel take a parameter
indicating the source device in the same way as GestureFlingStart.

I suppose if it doesn't matter this is fine. Maybe add a note that it doesn't
matter?

[wjmaclean, 2015/10/14 18:03:28]

I'll add a not for now. It's a bunch of additional plumbing, and generally
GestureFlingCancel gets called all over the place, as a "just in case" sort of
thing, so I don't know if having to specify a source device mightn't get
cumbersom.

   event.timeStampSeconds = GetCurrentEventTimeSec();
 
   if (force_layout_on_events_)
     view_->layout();
 
   HandleInputEventOnViewOrPopup(event);
 }
 
 void EventSender::GestureFlingStart(float x,
                                     float y,
@@ skipping 851 matching lines @@
   last_event_timestamp_ = event.timeStampSeconds;
 
   if (WebPagePopup* popup = view_->pagePopup()) {
     if (!WebInputEvent::isKeyboardEventType(event.type))
       return popup->handleInputEvent(event);
   }
   return view_->handleInputEvent(event);
 }
 
 }  // namespace test_runner