Notify WebContentsObservers of user interactions.

content/browser/renderer_host/render_widget_host_impl.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_
 
 #include <list>
 #include <map>
 #include <string>
@@ skipping 500 matching lines @@
   // its delegate.
 
   // Called when a mousewheel event was not processed by the renderer.
   virtual void UnhandledWheelEvent(const blink::WebMouseWheelEvent& event) {}
 
   // Notification that the user has made some kind of input that could
   // perform an action. The gestures that count are 1) any mouse down
   // event and 2) enter or space key presses.
   virtual void OnUserGesture() {}
 
+  // Notification that the user has made some kind of direct input with the
+  // page. Direct input includes 1) any mouse down event; 2) any mouse wheel
+  // event; 3) any raw key down event; and 4) any gesture tap event.
+  virtual void OnUserInteraction(const blink::WebInputEvent::Type type) {}

[jdduke (slow), 2015/10/26 16:02:53]

Should we keep the naming consistent, e.g., OnUserInteractionStarted or
something like that?

[dominickn, 2015/10/27 07:03:57]

From nasko's comment, I've removed the Start prefix and replaced it with Get in
the Observer and nothing elsewhere. This is consistent with OnUserGesture

+
   // Callbacks for notification when the renderer becomes unresponsive to user
   // input events, and subsequently responsive again.
   virtual void NotifyRendererUnresponsive() {}
   virtual void NotifyRendererResponsive() {}
 
   // Callback for notification that we failed to receive any rendered graphics
   // from a newly loaded page. Used for testing.
   virtual void NotifyNewContentRenderingTimeoutForTesting() {}
 
   // Called when auto-resize resulted in the renderer size changing.
@@ skipping 313 matching lines @@
   base::TimeDelta new_content_rendering_delay_;
 
   base::WeakPtrFactory<RenderWidgetHostImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_