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

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

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 65 matching lines @@
     m_chromeClientImpl = toChromeClientImpl(&m_webView->page()->chromeClient());
     m_result = WebNavigationPolicyIgnore;
   }
 
   void TearDown() override { m_webView->close(); }
 
   WebNavigationPolicy getNavigationPolicyWithMouseEvent(
       int modifiers,
       WebMouseEvent::Button button,
       bool asPopup) {
-    WebMouseEvent event;
-    event.modifiers = modifiers;
-    event.type = WebInputEvent::MouseUp;
+    WebMouseEvent event(WebInputEvent::MouseUp, modifiers,
+                        WebInputEvent::TimeStampForTesting);
     event.button = button;
     setCurrentInputEventForTest(&event);
     m_chromeClientImpl->setScrollbarsVisible(!asPopup);
     m_chromeClientImpl->show(NavigationPolicyIgnore);
     setCurrentInputEventForTest(0);
     return m_result;
   }
 
   bool isNavigationPolicyPopup() {
     m_chromeClientImpl->show(NavigationPolicyIgnore);
@@ skipping 173 matching lines @@
   ScopedPageSuspender suspender;
   LocalFrame* frame = toWebLocalFrameImpl(m_mainFrame)->frame();
   FrameLoadRequest request(frame->document());
   WindowFeatures features;
   EXPECT_EQ(nullptr,
             m_chromeClientImpl->createWindow(frame, request, features,
                                              NavigationPolicyNewForegroundTab));
 }
 
 }  // namespace blink