Notify WebContentsObservers of user interactions.

content/browser/renderer_host/render_view_host_delegate.h

Index: content/browser/renderer_host/render_view_host_delegate.h
diff --git a/content/browser/renderer_host/render_view_host_delegate.h b/content/browser/renderer_host/render_view_host_delegate.h
index 880589292c94fb996b476284bfa2b1fc6d230bab..ecfc7527baff9829abcb1ee127501f1f52e37eb9 100644
--- a/content/browser/renderer_host/render_view_host_delegate.h
+++ b/content/browser/renderer_host/render_view_host_delegate.h
@@ -15,6 +15,7 @@
 #include "content/common/content_export.h"
 #include "net/base/load_states.h"
 #include "third_party/WebKit/public/platform/WebDisplayMode.h"
+#include "third_party/WebKit/public/web/WebInputEvent.h"
 #include "third_party/WebKit/public/web/WebPopupType.h"
 #include "ui/base/window_open_disposition.h"
 
@@ -140,6 +141,11 @@ class CONTENT_EXPORT RenderViewHostDelegate {
   // bombing), see DownloadRequestLimiter for details.
   virtual void OnUserGesture() {}
 
+  // Notification the user has performed a direct interaction while focus was on
+  // the page. This is used to inform the delegate that a user is interacting
+  // with a site.
+  virtual void OnUserInteraction(const blink::WebInputEvent::Type type) {}
+
   // Notification from the renderer host that blocked UI event occurred.
   // This happens when there are tab-modal dialogs. In this case, the
   // notification is needed to let us draw attention to the dialog (i.e.