UMA metrics for use count of wheel and touch scrolls.

content/renderer/gpu/render_widget_compositor.cc

Index: content/renderer/gpu/render_widget_compositor.cc
diff --git a/content/renderer/gpu/render_widget_compositor.cc b/content/renderer/gpu/render_widget_compositor.cc
index ec1b85791ab2ba985900f3a9c31531b6b2e1d33a..4af6896da1edfa23af2e1cb3a0973994e4196cc0 100644
--- a/content/renderer/gpu/render_widget_compositor.cc
+++ b/content/renderer/gpu/render_widget_compositor.cc
@@ -1044,6 +1044,13 @@ void RenderWidgetCompositor::ApplyViewportDeltas(
                                  top_controls_delta);
 }
 
+void RenderWidgetCompositor::RecordWheelAndTouchScrollingCount(
+    bool has_scrolled_by_wheel,
+    bool has_scrolled_by_touch) {
+  delegate_->RecordWheelAndTouchScrollingCount(has_scrolled_by_wheel,
+                                               has_scrolled_by_touch);
+}
+
 void RenderWidgetCompositor::RequestNewCompositorFrameSink() {
   // If the host is closing, then no more compositing is possible.  This
   // prevents shutdown races between handling the close message and