UMA metrics for use count of wheel and touch scrolls.

content/renderer/render_widget.cc

Index: content/renderer/render_widget.cc
diff --git a/content/renderer/render_widget.cc b/content/renderer/render_widget.cc
index 6a4442fa9cb31bf7e7676f129c07fdb42836a797..a711e777967bed28e6ad3d21978afaab0905f346 100644
--- a/content/renderer/render_widget.cc
+++ b/content/renderer/render_widget.cc
@@ -870,6 +870,13 @@ void RenderWidget::ApplyViewportDeltas(
                                       top_controls_delta);
 }
 
+void RenderWidget::RecordWheelAndTouchScrollingCount(
+    bool has_scrolled_by_wheel,
+    bool has_scrolled_by_touch) {
+  GetWebWidget()->recordWheelAndTouchScrollingCount(has_scrolled_by_wheel,
+                                                    has_scrolled_by_touch);
+}
+
 void RenderWidget::BeginMainFrame(double frame_time_sec) {
   RenderThreadImpl* render_thread = RenderThreadImpl::current();
   // render_thread may be NULL in tests.