Log NTP hovers in 1993 clients

chrome/browser/ui/search/instant_controller.cc

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/search/instant_controller.h"
 
 #include <iterator>
 
 #include "base/metrics/histogram.h"
 #include "base/prefs/pref_service.h"
@@ skipping 1021 matching lines @@
     ResetInstantTab();
 }
 
 void InstantController::TabDeactivated(content::WebContents* contents) {
   LOG_INSTANT_DEBUG_EVENT(this, "TabDeactivated");
   if (extended_enabled() && !contents->IsBeingDestroyed())
     CommitIfPossible(INSTANT_COMMIT_FOCUS_LOST);
 
   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,
                                           bool use_local_page_only) {
   LOG_INSTANT_DEBUG_EVENT(this, base::StringPrintf(
       "SetInstantEnabled: instant_enabled=%d, use_local_page_only=%d",
       instant_enabled, use_local_page_only));
 
   // Non extended mode does not care about |use_local_page_only|.
   if (instant_enabled == instant_enabled_ &&
@@ skipping 859 matching lines @@
 
 bool InstantController::InStartup() const {
   // TODO(shishir): This is not completely reliable. Find a better way to detect
   // startup time.
   return !browser_->GetActiveWebContents();
 }
 
 InstantService* InstantController::GetInstantService() const {
   return InstantServiceFactory::GetForProfile(profile());
 }