UMA metrics for use count of wheel and touch scrolls.

content/renderer/render_widget.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_RENDERER_RENDER_WIDGET_H_
 #define CONTENT_RENDERER_RENDER_WIDGET_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 219 matching lines @@
 
   // Requests a BeginMainFrame callback from the compositor.
   void SetNeedsMainFrame();
 
   // RenderWidgetCompositorDelegate
   void ApplyViewportDeltas(const gfx::Vector2dF& inner_delta,
                            const gfx::Vector2dF& outer_delta,
                            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 BeginMainFrame(double frame_time_sec) override;
   void RequestNewCompositorFrameSink(
       bool fallback,
       const CompositorFrameSinkCallback& callback) override;
   void DidCommitAndDrawCompositorFrame() override;
   void DidCommitCompositorFrame() override;
   void DidCompletePageScaleAnimation() override;
   void DidReceiveCompositorFrameAck() override;
   bool IsClosing() const override;
   void RequestScheduleAnimation() override;
@@ skipping 620 matching lines @@
   uint32_t current_content_source_id_;
 
   base::WeakPtrFactory<RenderWidget> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidget);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_WIDGET_H_