Collapse the API surface on WebInputEvent via accessor functions.

components/printing/test/print_web_view_helper_browsertest.cc

Index: components/printing/test/print_web_view_helper_browsertest.cc
diff --git a/components/printing/test/print_web_view_helper_browsertest.cc b/components/printing/test/print_web_view_helper_browsertest.cc
index 2b5018528ee85ffe827cae468522cac0b83cc6a5..279ae825f41acee18f4b86ca53c553085a9ae2ba 100644
--- a/components/printing/test/print_web_view_helper_browsertest.cc
+++ b/components/printing/test/print_web_view_helper_browsertest.cc
@@ -340,14 +340,15 @@ TEST_F(MAYBE_PrintWebViewHelperTest, AllowUserOriginatedPrinting) {
 
   gfx::Rect bounds = GetElementBounds("print");
   EXPECT_FALSE(bounds.IsEmpty());
-  blink::WebMouseEvent mouse_event;
-  mouse_event.type = blink::WebInputEvent::MouseDown;
+  blink::WebMouseEvent mouse_event(blink::WebInputEvent::MouseDown,
+                                   blink::WebInputEvent::NoModifiers,
+                                   blink::WebInputEvent::TimeStampForTesting);
   mouse_event.button = blink::WebMouseEvent::Button::Left;
   mouse_event.x = bounds.CenterPoint().x();
   mouse_event.y = bounds.CenterPoint().y();
   mouse_event.clickCount = 1;
   SendWebMouseEvent(mouse_event);
-  mouse_event.type = blink::WebInputEvent::MouseUp;
+  mouse_event.setType(blink::WebInputEvent::MouseUp);
   SendWebMouseEvent(mouse_event);
   ProcessPendingMessages();