UMA metrics for use count of wheel and touch scrolls.

third_party/WebKit/Source/web/WebViewImpl.h

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 131 matching lines @@
   void themeChanged() override;
   WebInputEventResult handleInputEvent(const WebCoalescedInputEvent&) override;
   void setCursorVisibilityState(bool isVisible) override;
   bool hasTouchEventHandlersAt(const WebPoint&) override;
 
   void applyViewportDeltas(const WebFloatSize& visualViewportDelta,
                            const WebFloatSize& layoutViewportDelta,
                            const WebFloatSize& elasticOverscrollDelta,
                            float pageScaleDelta,
                            float browserControlsShownRatioDelta) override;
+  void recordWheelAndTouchScrollingCount(bool hasScrolledByWheel,
+                                         bool hasScrolledByTouch) override;
   void mouseCaptureLost() override;
   void setFocus(bool enable) override;
   WebRange compositionRange() override;
   WebColor backgroundColor() const override;
   WebPagePopup* pagePopup() const override;
   bool selectionBounds(WebRect& anchor, WebRect& focus) const override;
   bool selectionTextDirection(WebTextDirection& start,
                               WebTextDirection& end) const override;
   bool isSelectionAnchorFirst() const override;
   WebRange caretOrSelectionRange() override;
@@ skipping 580 matching lines @@
   Persistent<ResizeViewportAnchor> m_resizeViewportAnchor;
 };
 
 // We have no ways to check if the specified WebView is an instance of
 // WebViewImpl because WebViewImpl is the only implementation of WebView.
 DEFINE_TYPE_CASTS(WebViewImpl, WebView, webView, true, true);
 
 }  // namespace blink
 
 #endif