Notify WebContentsObservers of user interactions.

content/public/browser/web_contents_observer.h

Index: content/public/browser/web_contents_observer.h
diff --git a/content/public/browser/web_contents_observer.h b/content/public/browser/web_contents_observer.h
index c2fcffbe0f2efb50491184386b27a6aa11d21753..ca46dd0c759ecccfc0d9449e4914f363177bf431 100644
--- a/content/public/browser/web_contents_observer.h
+++ b/content/public/browser/web_contents_observer.h
@@ -13,6 +13,7 @@
 #include "content/public/common/security_style.h"
 #include "ipc/ipc_listener.h"
 #include "ipc/ipc_sender.h"
+#include "third_party/WebKit/public/web/WebInputEvent.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/base/page_transition_types.h"
 #include "ui/base/window_open_disposition.h"
@@ -315,6 +316,11 @@ class CONTENT_EXPORT WebContentsObserver : public IPC::Listener,
   // This indicates that the next navigation was triggered by a user gesture.

[jdduke (slow), 2015/10/21 20:53:52]

Perhaps a TODO Here to remove this in favor of the below method.

[dominickn, 2015/10/26 04:14:24]

Done.

   virtual void DidGetUserGesture() {}
 
+  // Called when there has been direct user interaction with the web contents.
+  // Direct user 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 DidGetUserInput(const blink::WebInputEvent::Type type) {}

[jdduke (slow), 2015/10/21 20:53:51]

Let's call this |DidStartUserInteraction|, to make it more suggestive that this
is a subset of event types.

[dominickn, 2015/10/26 04:14:24]

Done.

+
   // This method is invoked when a RenderViewHost of this WebContents was
   // configured to ignore UI events, and an UI event took place.
   virtual void DidGetIgnoredUIEvent() {}