1 files changed, 26 insertions, 5 deletions
diff --git a/content/browser/media/capture/window_activity_tracker.h b/content/browser/media/capture/window_activity_tracker.h
index d7b8d0f..7bdef1e 100644
--- a/content/browser/media/capture/window_activity_tracker.h
+++ b/content/browser/media/capture/window_activity_tracker.h
@@ -5,9 +5,11 @@
 #ifndef CONTENT_BROWSER_MEDIA_CAPTURE_WINDOW_ACTIVITY_TRACKER_H_
 #define CONTENT_BROWSER_MEDIA_CAPTURE_WINDOW_ACTIVITY_TRACKER_H_
 
+#include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "content/common/content_export.h"
+#include "ui/gfx/native_widget_types.h"
 
 namespace content {
 
@@ -15,20 +17,39 @@ namespace content {
 // whether the user is actively interacting with UI.
 class CONTENT_EXPORT WindowActivityTracker {
  public:
-  virtual ~WindowActivityTracker() {}
+  static scoped_ptr<WindowActivityTracker> Create(gfx::NativeView view);
+
+  WindowActivityTracker();
+  virtual ~WindowActivityTracker();
 
   // Returns true if UI interaction is active.
-  virtual bool IsUiInteractionActive() const = 0;
+  bool IsUiInteractionActive() const;
 
   // Reports on every mouse movement activity on the window.
-  virtual void RegisterMouseInteractionObserver(
-      const base::Closure& observer) {}
+  void RegisterMouseInteractionObserver(const base::Closure& observer);
 
   // Resets any previous UI activity tracked.
-  virtual void Reset() = 0;
+  void Reset();
 
   // Returns a weak pointer.
   virtual base::WeakPtr<WindowActivityTracker> GetWeakPtr() = 0;
+
+ protected:
+  void OnMouseActivity();
+
+ private:
+  // The last time a UI event was detected.
+  base::TimeTicks last_time_ui_event_detected_;
+
+  // Runs on any mouse interaction from user.
+  base::Closure mouse_interaction_observer_;
+
+  // The number of UI events detected so far. In case of continuous events
+  // such as mouse movement, a single continuous movement is treated
+  // as one event.
+  int ui_events_count_;
+
+  DISALLOW_COPY_AND_ASSIGN(WindowActivityTracker);
 };
 
 }  // namespace content