UMA metrics for use count of wheel and touch scrolls.

content/browser/renderer_host/compositor_impl_android.h

Index: content/browser/renderer_host/compositor_impl_android.h
diff --git a/content/browser/renderer_host/compositor_impl_android.h b/content/browser/renderer_host/compositor_impl_android.h
index f88b8b306b4bb748c2afac579806a90b18ce3ee5..612cf4bfa34ddffafd314c204f5b95efe0511a23 100644
--- a/content/browser/renderer_host/compositor_impl_android.h
+++ b/content/browser/renderer_host/compositor_impl_android.h
@@ -88,6 +88,8 @@ class CONTENT_EXPORT CompositorImpl
                            const gfx::Vector2dF& elastic_overscroll_delta,
                            float page_scale,
                            float top_controls_delta) override {}
+  void RecordWheelAndTouchScrollingCount(bool has_scrolled_by_wheel,
+                                         bool has_scrolled_by_touch) override {}
   void RequestNewCompositorFrameSink() override;
   void DidInitializeCompositorFrameSink() override;
   void DidFailToInitializeCompositorFrameSink() override;