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

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

Index: third_party/WebKit/Source/web/tests/RootScrollerTest.cpp
diff --git a/third_party/WebKit/Source/web/tests/RootScrollerTest.cpp b/third_party/WebKit/Source/web/tests/RootScrollerTest.cpp
index 1038ec61f025a1192cd7ef4c52c2a2ad9bca8061..34cfd0faec65f772ff014979a6b1f3c55ce4c865 100644
--- a/third_party/WebKit/Source/web/tests/RootScrollerTest.cpp
+++ b/third_party/WebKit/Source/web/tests/RootScrollerTest.cpp
@@ -149,8 +149,8 @@ class RootScrollerTest : public ::testing::Test {
                                        WebGestureDevice device,
                                        int deltaX,
                                        int deltaY) {
-    WebGestureEvent event;
-    event.type = type;
+    WebGestureEvent event(type, WebInputEvent::NoModifiers,
+                          WebInputEvent::TimeStampForTesting);
     event.sourceDevice = device;
     event.x = 100;
     event.y = 100;