Use static_cast instead of reinterpret_cast for downcasting

static_cast is better suited for downcasting since it can check that the
types are related.

/content/renderer/pepper
This CL was uploaded by git cl split.

R=raymes@chromium.org

Change-Id: I7a8be6603564a805c85b254fee8dcf24fee6b30f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2434630
Auto-Submit: Kevin McNee <mcnee@chromium.org>
Reviewed-by: Raymes Khoury <raymes@chromium.org>
Commit-Queue: Raymes Khoury <raymes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#811442}

content/renderer/pepper/event_conversion.cc

@@ -320,8 +320,7 @@ void SetPPTouchPoints(const WebTouchPoint* touches,
 
 void AppendTouchEvent(const WebInputEvent& event,
                       std::vector<InputEventData>* result_events) {
-  const WebTouchEvent& touch_event =
-      reinterpret_cast<const WebTouchEvent&>(event);
+  const WebTouchEvent& touch_event = static_cast<const WebTouchEvent&>(event);
 
   InputEventData result = GetEventWithCommonFieldsAndType(event);