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

chrome/browser/apps/guest_view/web_view_interactive_browsertest.cc

Index: chrome/browser/apps/guest_view/web_view_interactive_browsertest.cc
diff --git a/chrome/browser/apps/guest_view/web_view_interactive_browsertest.cc b/chrome/browser/apps/guest_view/web_view_interactive_browsertest.cc
index 608fd6f008c1e22ff983efb4e2843a8e276535f7..4c2841a89bd9671b139211423c4887f3d93cfaac 100644
--- a/chrome/browser/apps/guest_view/web_view_interactive_browsertest.cc
+++ b/chrome/browser/apps/guest_view/web_view_interactive_browsertest.cc
@@ -294,18 +294,18 @@ class WebViewInteractiveTestBase : public extensions::PlatformAppBrowserTest {
                              blink::WebMouseEvent::Button button,
                              int x,
                              int y) {
-    blink::WebMouseEvent mouse_event;
+    blink::WebMouseEvent mouse_event(blink::WebInputEvent::MouseDown,
+                                     blink::WebInputEvent::NoModifiers,
+                                     blink::WebInputEvent::TimeStampForTesting);
     mouse_event.button = button;
     mouse_event.x = mouse_event.windowX = x;
     mouse_event.y = mouse_event.windowY = y;
-    mouse_event.modifiers = 0;
     // Needed for the WebViewTest.ContextMenuPositionAfterCSSTransforms
     gfx::Rect rect = rwh->GetView()->GetViewBounds();
     mouse_event.globalX = x + rect.x();
     mouse_event.globalY = y + rect.y();
-    mouse_event.type = blink::WebInputEvent::MouseDown;
     rwh->ForwardMouseEvent(mouse_event);
-    mouse_event.type = blink::WebInputEvent::MouseUp;
+    mouse_event.setType(blink::WebInputEvent::MouseUp);
     rwh->ForwardMouseEvent(mouse_event);
   }