Getting RenderWidgetHostViewWin ready for a GestureRecognizer.

ui/aura/root_window.cc

Index: ui/aura/root_window.cc
diff --git a/ui/aura/root_window.cc b/ui/aura/root_window.cc
index aeb3651bd788d7937dfccff504cd475a57a3de6f..c516cc77bb68b1c423c088d5483a6030b0809f58 100644
--- a/ui/aura/root_window.cc
+++ b/ui/aura/root_window.cc
@@ -826,7 +826,7 @@ bool RootWindow::DispatchCancelTouchEvent(ui::TouchEvent* event) {
 ui::GestureEvent* RootWindow::CreateGestureEvent(ui::EventType type,
     const gfx::Point& location,
     int flags,
-    const base::Time time,
+    const base::Time& time,
     float param_first,
     float param_second,
     unsigned int touch_id_bitfield) {
@@ -834,10 +834,11 @@ ui::GestureEvent* RootWindow::CreateGestureEvent(ui::EventType type,
                           param_first, param_second, touch_id_bitfield);
 }
 
-ui::TouchEvent* RootWindow::CreateTouchEvent(ui::EventType type,
-                                             const gfx::Point& location,
-                                             int touch_id,
-                                             base::TimeDelta time_stamp) {
+ui::TouchEvent* RootWindow::CreateTouchEvent(
+    ui::EventType type,
+    const gfx::Point& location,
+    int touch_id,
+    const base::TimeDelta& time_stamp) {
   return new TouchEvent(type, location, touch_id, time_stamp);
 }