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

content/browser/renderer_host/input/synthetic_touch_driver.cc

Index: content/browser/renderer_host/input/synthetic_touch_driver.cc
diff --git a/content/browser/renderer_host/input/synthetic_touch_driver.cc b/content/browser/renderer_host/input/synthetic_touch_driver.cc
index 19b94cb150c52ea1a86a6e3c1aeabd9c6fd86e19..3adb753c6162b1c65e3a2d338e5aaad29ff77849 100644
--- a/content/browser/renderer_host/input/synthetic_touch_driver.cc
+++ b/content/browser/renderer_host/input/synthetic_touch_driver.cc
@@ -21,9 +21,8 @@ SyntheticTouchDriver::~SyntheticTouchDriver() {}
 
 void SyntheticTouchDriver::DispatchEvent(SyntheticGestureTarget* target,
                                          const base::TimeTicks& timestamp) {
-  touch_event_.timeStampSeconds = ConvertTimestampToSeconds(timestamp);
-  if (touch_event_.type != blink::WebInputEvent::Undefined)
-    target->DispatchInputEventToPlatform(touch_event_);
+  touch_event_.setTimeStampSeconds(ConvertTimestampToSeconds(timestamp));
+  target->DispatchInputEventToPlatform(touch_event_);
   touch_event_.ResetPoints();
 }