Tiimer based phase info generated for mouse wheel events.

content/browser/renderer_host/render_widget_host_view_base.h

Index: content/browser/renderer_host/render_widget_host_view_base.h
diff --git a/content/browser/renderer_host/render_widget_host_view_base.h b/content/browser/renderer_host/render_widget_host_view_base.h
index 6bb3159a0dd1937ba1f31c4d35b05847208b11e6..1824f311bc16a0a2a2b040d6a621efcde9fe86aa 100644
--- a/content/browser/renderer_host/render_widget_host_view_base.h
+++ b/content/browser/renderer_host/render_widget_host_view_base.h
@@ -416,6 +416,10 @@ class CONTENT_EXPORT RenderWidgetHostViewBase : public RenderWidgetHostView,
 
   bool is_fullscreen() { return is_fullscreen_; }
 
+  bool wheel_scroll_latching_enabled() {
+    return wheel_scroll_latching_enabled_;
+  }
+
   // Exposed for testing.
   virtual bool IsChildFrameForTesting() const;
   virtual cc::SurfaceId SurfaceIdForTesting() const;
@@ -455,6 +459,8 @@ class CONTENT_EXPORT RenderWidgetHostViewBase : public RenderWidgetHostView,
   // destroyed before the RWHV is destroyed.
   TextInputManager* text_input_manager_;
 
+  const bool wheel_scroll_latching_enabled_;
+
  private:
   void FlushInput();