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

third_party/WebKit/public/platform/WebGestureEvent.h

 // 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.
 
 #ifndef WebGestureEvent_h
 #define WebGestureEvent_h
 
 #include "WebGestureDevice.h"
 #include "WebInputEvent.h"
 
@@ skipping 136 matching lines @@
       // as a part of fling boost events sequence.
       bool preventBoosting;
     } flingCancel;
 
     struct {
       bool zoomDisabled;
       float scale;
     } pinchUpdate;
   } data;
 
+  WebGestureEvent(Type type, int modifiers, double timeStampSeconds)
+      : WebInputEvent(sizeof(WebGestureEvent),
+                      type,
+                      modifiers,
+                      timeStampSeconds),
+        sourceDevice(WebGestureDeviceUninitialized),
+        resendingPluginId(-1) {}
+
   WebGestureEvent()
       : WebInputEvent(sizeof(WebGestureEvent)),
-        x(0),
-        y(0),
-        globalX(0),
-        globalY(0),
         sourceDevice(WebGestureDeviceUninitialized),
         resendingPluginId(-1) {}
 };
 
 #pragma pack(pop)
 
 }  // namespace blink
 
 #endif  // WebGestureEvent_h