Collapse the API surface on WebInputEvent via accessor functions.

third_party/WebKit/Source/web/tests/VisualViewportTest.cpp

 // 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 "core/frame/VisualViewport.h"
 
 #include "core/dom/Document.h"
 #include "core/frame/BrowserControls.h"
 #include "core/frame/FrameHost.h"
 #include "core/frame/FrameView.h"
@@ skipping 1847 matching lines @@
   VisualViewport& visualViewport =
       frame()->page()->frameHost().visualViewport();
 
   // Apply some scroll and scale from the impl-side.
   webViewImpl()->applyViewportDeltas(WebFloatSize(300, 200), WebFloatSize(0, 0),
                                      WebFloatSize(0, 0), 2, 0);
 
   EXPECT_SIZE_EQ(FloatSize(300, 200), visualViewport.getScrollOffset());
 
   // Send a scroll event on the main thread path.
-  WebGestureEvent gsu;
+  WebGestureEvent gsu(WebInputEvent::GestureScrollUpdate,
+                      WebInputEvent::NoModifiers,
+                      WebInputEvent::TimeStampForTesting);
   gsu.setFrameScale(1);
-  gsu.type = WebInputEvent::GestureScrollUpdate;
   gsu.sourceDevice = WebGestureDeviceTouchpad;
   gsu.data.scrollUpdate.deltaX = -50;
   gsu.data.scrollUpdate.deltaY = -60;
   gsu.data.scrollUpdate.deltaUnits = WebGestureEvent::PrecisePixels;
   gsu.data.scrollUpdate.velocityX = 1;
   gsu.data.scrollUpdate.velocityY = 1;
 
   frame()->eventHandler().handleGestureEvent(gsu);
 
   // The scroll sent from the impl-side must not be overwritten.
@@ skipping 589 matching lines @@
                                    "  body {"
                                    "    margin: 0px;"
                                    "  }"
                                    "  div { height:110vh; width: 110vw; }"
                                    "</style>"
                                    "<div></div>",
                                    baseURL);
 }
 
 }  // namespace