Fix the double-tap to click gesture in touch accessibility mode.

ash/ash_touch_exploration_manager_chromeos.cc

Index: ash/ash_touch_exploration_manager_chromeos.cc
diff --git a/ash/ash_touch_exploration_manager_chromeos.cc b/ash/ash_touch_exploration_manager_chromeos.cc
index c9ed6c238f7c63c532872d726e9708fb5f1e0bda..6b1845d1c16575132feac903369bf58215bf96cf 100644
--- a/ash/ash_touch_exploration_manager_chromeos.cc
+++ b/ash/ash_touch_exploration_manager_chromeos.cc
@@ -97,6 +97,14 @@ void AshTouchExplorationManager::OnWindowActivated(
   UpdateTouchExplorationState();
 }
 
+void AshTouchExplorationManager::SetTouchAccessibilityAnchorPoint(
+    const gfx::Point& anchor_point) {
+  if (touch_exploration_controller_) {
+    touch_exploration_controller_->SetTouchAccessibilityAnchorPoint(
+        anchor_point);
+  }
+}
+
 void AshTouchExplorationManager::UpdateTouchExplorationState() {
   // Comes from components/exo/shell_surface.cc.
   const char kExoShellSurfaceWindowName[] = "ExoShellSurface";