Log NTP hovers in 1993 clients

chrome/browser/ui/search/instant_controller.cc

Index: chrome/browser/ui/search/instant_controller.cc
diff --git a/chrome/browser/ui/search/instant_controller.cc b/chrome/browser/ui/search/instant_controller.cc
index cae96060ec4c6f4ba2240494300524ee76509966..977f129a2ec574682e57c0755876c873638564d8 100644
--- a/chrome/browser/ui/search/instant_controller.cc
+++ b/chrome/browser/ui/search/instant_controller.cc
@@ -1039,6 +1039,11 @@ void InstantController::TabDeactivated(content::WebContents* contents) {
 
   if (GetOverlayContents())
     HideOverlay();
+
+  // If user is deactivating an NTP tab, log the number of mouseovers for this
+  // NTP session.
+  if (chrome::IsInstantNTP(contents))
+    InstantNTP::EmitMouseoverCount(contents);
 }
 
 void InstantController::SetInstantEnabled(bool instant_enabled,