input: Remove dead code.

content/browser/renderer_host/render_widget_host_view_aura.h

Index: content/browser/renderer_host/render_widget_host_view_aura.h
diff --git a/content/browser/renderer_host/render_widget_host_view_aura.h b/content/browser/renderer_host/render_widget_host_view_aura.h
index 7e558ed9b473f611077b22f415b1a60b3f5655f5..b3af31a91d14d6201701511758246eea0aac719c 100644
--- a/content/browser/renderer_host/render_widget_host_view_aura.h
+++ b/content/browser/renderer_host/render_widget_host_view_aura.h
@@ -144,7 +144,6 @@ class CONTENT_EXPORT RenderWidgetHostViewAura
   void EndFrameSubscription() override;
   bool HasAcceleratedSurface(const gfx::Size& desired_size) override;
   gfx::Rect GetBoundsInRootWindow() override;
-  void OnSetNeedsFlushInput() override;
   void WheelEventAck(const blink::WebMouseWheelEvent& event,
                      InputEventAckState ack_result) override;
   void GestureEventAck(const blink::WebGestureEvent& event,
@@ -535,9 +534,6 @@ class CONTENT_EXPORT RenderWidgetHostViewAura
   // Whether a request for begin frames has been issued.
   bool needs_begin_frames_;
 
-  // Whether a request to flush input has been issued.
-  bool needs_flush_input_;
-
   // Whether or not a frame observer has been added.
   bool added_frame_observer_;