Propagate touch area to WebKit for GestureTapDown event

content/browser/renderer_host/render_widget_host_view_win.cc

Index: content/browser/renderer_host/render_widget_host_view_win.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_win.cc b/content/browser/renderer_host/render_widget_host_view_win.cc
index d85961269f47d794418d9e24df501b38a306032e..5a107767a3987f01e21eed37828ebc0a1ea2e2f2 100644
--- a/content/browser/renderer_host/render_widget_host_view_win.cc
+++ b/content/browser/renderer_host/render_widget_host_view_win.cc
@@ -330,6 +330,12 @@ WebKit::WebGestureEvent CreateWebGestureEvent(HWND hwnd,
       gesture_event.data.tap.height =
           gesture.details().bounding_box().height();
       break;
+    case ui::ET_GESTURE_TAP_DOWN:
+      gesture_event.data.tapDown.width =
+          gesture.details().bounding_box().width();
+      gesture_event.data.tapDown.height =
+          gesture.details().bounding_box().height();
+      break;
     case ui::ET_GESTURE_SCROLL_UPDATE:
       gesture_event.data.scrollUpdate.deltaX = gesture.details().scroll_x();
       gesture_event.data.scrollUpdate.deltaY = gesture.details().scroll_y();