Only exclude workarea from touch-exploration with active shell-surface

ui/chromeos/touch_exploration_controller.h

Index: ui/chromeos/touch_exploration_controller.h
diff --git a/ui/chromeos/touch_exploration_controller.h b/ui/chromeos/touch_exploration_controller.h
index da042d11e3fa135ea2078c4d86b8b7b259bc9ce3..15925186252e6804c11b1a243bc2df79e9b1af45 100644
--- a/ui/chromeos/touch_exploration_controller.h
+++ b/ui/chromeos/touch_exploration_controller.h
@@ -189,6 +189,8 @@ class UI_CHROMEOS_EXPORT TouchExplorationController
   // other than touch exploration.
   void SetTouchAccessibilityAnchorPoint(const gfx::Point& anchor_point);
 
+  void SetExcludeBounds(const gfx::Rect& bounds);
+
  private:
   friend class TouchExplorationControllerTestApi;
 
@@ -500,6 +502,9 @@ class UI_CHROMEOS_EXPORT TouchExplorationController
   // This toggles whether VLOGS are turned on or not.
   bool VLOG_on_;
 
+  // LocatedEvents within this area should be left alone.
+  gfx::Rect exclude_bounds_;
+
   DISALLOW_COPY_AND_ASSIGN(TouchExplorationController);
 };