Add constructors to WebInputEvents and setters so we can work at cleaning up these public structs.

content/browser/renderer_host/render_widget_host_view_event_handler.cc

 // Copyright 2016 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/browser/renderer_host/render_widget_host_view_event_handler.h"
 
 #include "base/metrics/user_metrics_action.h"
 #include "content/browser/renderer_host/input/touch_selection_controller_client_aura.h"
 #include "content/browser/renderer_host/overscroll_controller.h"
 #include "content/browser/renderer_host/render_view_host_delegate.h"
@@ skipping 487 matching lines @@
   // caret won't be moved with an ongoing composition text.
   if (event->type() == ui::ET_GESTURE_TAP)
     FinishImeCompositionSession();
 
   blink::WebGestureEvent gesture =
       ui::MakeWebGestureEvent(*event, base::Bind(&GetScreenLocationFromEvent));
   if (event->type() == ui::ET_GESTURE_TAP_DOWN) {
     // Webkit does not stop a fling-scroll on tap-down. So explicitly send an
     // event to stop any in-progress flings.
     blink::WebGestureEvent fling_cancel = gesture;
-    fling_cancel.type = blink::WebInputEvent::GestureFlingCancel;
+    fling_cancel.setType(blink::WebInputEvent::GestureFlingCancel);
     fling_cancel.sourceDevice = blink::WebGestureDeviceTouchscreen;
     if (ShouldRouteEvent(event)) {
       host_->delegate()->GetInputEventRouter()->RouteGestureEvent(
           host_view_, &fling_cancel,
           ui::LatencyInfo(ui::SourceEventType::TOUCH));
     } else {
       host_->ForwardGestureEvent(fling_cancel);
     }
   }
 
@@ skipping 345 matching lines @@
   host_->ForwardWheelEventWithLatencyInfo(event, latency);
 }
 
 void RenderWidgetHostViewEventHandler::ProcessTouchEvent(
     const blink::WebTouchEvent& event,
     const ui::LatencyInfo& latency) {
   host_->ForwardTouchEventWithLatencyInfo(event, latency);
 }
 
 }  // namespace content