Notify WebContentsObservers of user interactions.

content/browser/renderer_host/render_widget_host_impl.cc

Index: content/browser/renderer_host/render_widget_host_impl.cc
diff --git a/content/browser/renderer_host/render_widget_host_impl.cc b/content/browser/renderer_host/render_widget_host_impl.cc
index c89bba6c56f4cf3c9c60626f85bef724b0c5b06e..a6a97eb8eecf451da83f760f8538569cdfe5f46b 100644
--- a/content/browser/renderer_host/render_widget_host_impl.cc
+++ b/content/browser/renderer_host/render_widget_host_impl.cc
@@ -1445,6 +1445,12 @@ void RenderWidgetHostImpl::RendererIsResponsive() {
   }
 }
 
+void RenderWidgetHostImpl::OnUserInteraction(
+    const blink::WebInputEvent::Type type) {
+  if (delegate_)
+    delegate_->OnUserInteraction(type);
+}
+
 void RenderWidgetHostImpl::ClearDisplayedGraphics() {
   NotifyNewContentRenderingTimeoutForTesting();
   if (view_)
@@ -1858,6 +1864,12 @@ InputEventAckState RenderWidgetHostImpl::FilterInputEvent(
     OnUserGesture();
   }
 
+  if (event.type == WebInputEvent::MouseDown ||
+      event.type == WebInputEvent::GestureTapDown ||
+      event.type == WebInputEvent::RawKeyDown) {
+    OnUserInteraction(event.type);
+  }
+
   return view_ ? view_->FilterInputEvent(event)
                : INPUT_EVENT_ACK_STATE_NOT_CONSUMED;
 }