[not for review - epic CL] Adding Elastic+Momentum+Layered scrolling to views::ScrollView

ui/views/controls/scrollbar/scrollbar_unittest.cc

Index: ui/views/controls/scrollbar/scrollbar_unittest.cc
diff --git a/ui/views/controls/scrollbar/scrollbar_unittest.cc b/ui/views/controls/scrollbar/scrollbar_unittest.cc
index b225098c7a7615af420e14965490d9911a6c2c7b..59dcc13a6d7b6faf955295d595961ed04a67f740 100644
--- a/ui/views/controls/scrollbar/scrollbar_unittest.cc
+++ b/ui/views/controls/scrollbar/scrollbar_unittest.cc
@@ -34,6 +34,8 @@ class TestScrollBarController : public views::ScrollBarController {
     return 10;
   }
 
+  void OnScrollEventFromScrollBar(ui::ScrollEvent* event) override {}
+
   // We save the last values in order to assert the correctness of the scroll
   // operation.
   views::ScrollBar* last_source;