events: Update scroll and touch handlers to not return EventResult.

ui/aura/root_window_unittest.cc

Index: ui/aura/root_window_unittest.cc
diff --git a/ui/aura/root_window_unittest.cc b/ui/aura/root_window_unittest.cc
index 5a6739ae3f0d37f9291ef7a1caf14f0f6e1b3db7..e76c787c36c365f4eb5d3f25e351912935181679 100644
--- a/ui/aura/root_window_unittest.cc
+++ b/ui/aura/root_window_unittest.cc
@@ -451,14 +451,12 @@ class EventFilterRecorder : public ui::EventHandler {
     return ui::ER_UNHANDLED;
   }
 
-  virtual ui::EventResult OnScrollEvent(ui::ScrollEvent* event) OVERRIDE {
+  virtual void OnScrollEvent(ui::ScrollEvent* event) OVERRIDE {
     events_.push_back(event->type());
-    return ui::ER_UNHANDLED;
   }
 
-  virtual ui::EventResult OnTouchEvent(ui::TouchEvent* event) OVERRIDE {
+  virtual void OnTouchEvent(ui::TouchEvent* event) OVERRIDE {
     events_.push_back(event->type());
-    return ui::ER_UNHANDLED;
   }
 
   virtual void OnGestureEvent(ui::GestureEvent* event) OVERRIDE {