events: Change gesture-event handler in EventHandler to not return any values.

ui/views/widget/native_widget_aura_unittest.cc

Index: ui/views/widget/native_widget_aura_unittest.cc
diff --git a/ui/views/widget/native_widget_aura_unittest.cc b/ui/views/widget/native_widget_aura_unittest.cc
index f0db7c2ab0b2536d58e80e372d804b5699c20fb0..7e06b79c7e78dd7a15fc104e2e23e6df4dde4ee6 100644
--- a/ui/views/widget/native_widget_aura_unittest.cc
+++ b/ui/views/widget/native_widget_aura_unittest.cc
@@ -216,9 +216,10 @@ class GestureTrackingView : public views::View {
   }
 
   // View overrides:
-  virtual ui::EventResult OnGestureEvent(ui::GestureEvent* event) OVERRIDE {
+  virtual void OnGestureEvent(ui::GestureEvent* event) OVERRIDE {
     got_gesture_event_ = true;
-    return consume_gesture_event_ ? ui::ER_CONSUMED : ui::ER_UNHANDLED;
+    if (consume_gesture_event_)
+      event->StopPropagation();
   }
 
  private: