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

content/renderer/render_widget_unittest.cc

Index: content/renderer/render_widget_unittest.cc
diff --git a/content/renderer/render_widget_unittest.cc b/content/renderer/render_widget_unittest.cc
index 2a4ebd628ef8a0a11243d5d782e99829f365c1d1..c030d1c5f034cdadd3c7509847f4b70e9304e38e 100644
--- a/content/renderer/render_widget_unittest.cc
+++ b/content/renderer/render_widget_unittest.cc
@@ -21,6 +21,7 @@
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/WebKit/public/platform/WebInputEvent.h"
 #include "third_party/WebKit/public/web/WebDeviceEmulationParams.h"
+#include "ui/events/base_event_utils.h"
 #include "ui/events/blink/web_input_event_traits.h"
 #include "ui/gfx/geometry/rect.h"
 
@@ -247,8 +248,10 @@ TEST_F(RenderWidgetUnittest, EventOverscroll) {
       .WillRepeatedly(
           ::testing::Return(blink::WebInputEventResult::NotHandled));
 
-  blink::WebGestureEvent scroll;
-  scroll.type = blink::WebInputEvent::GestureScrollUpdate;
+  blink::WebGestureEvent scroll(
+      blink::WebInputEvent::GestureScrollUpdate,
+      blink::WebInputEvent::NoModifiers,
+      ui::EventTimeStampToSeconds(ui::EventTimeForNow()));
   scroll.x = -10;
   scroll.data.scrollUpdate.deltaY = 10;
   widget()->SendInputEvent(scroll);