Revert of Remove the 10 second delay before user input generates engagement.

chrome/browser/engagement/site_engagement_helper.cc

Index: chrome/browser/engagement/site_engagement_helper.cc
diff --git a/chrome/browser/engagement/site_engagement_helper.cc b/chrome/browser/engagement/site_engagement_helper.cc
index 166b8f398eaff8c27b285a9622f4fe8226aa066b..dbef378f26fe037033dba077e6ab050ed5bd2547 100644
--- a/chrome/browser/engagement/site_engagement_helper.cc
+++ b/chrome/browser/engagement/site_engagement_helper.cc
@@ -23,6 +23,7 @@
 namespace {
 
 int g_seconds_to_pause_engagement_detection = 10;
+int g_seconds_delay_after_navigation = 10;
 int g_seconds_delay_after_media_starts = 10;
 int g_seconds_delay_after_show = 5;
 
@@ -34,6 +35,12 @@
 void SiteEngagementService::Helper::SetSecondsBetweenUserInputCheck(
     int seconds) {
   g_seconds_to_pause_engagement_detection = seconds;
+}
+
+// static
+void SiteEngagementService::Helper::SetSecondsTrackingDelayAfterNavigation(
+    int seconds) {
+  g_seconds_delay_after_navigation = seconds;
 }
 
 // static
@@ -260,7 +267,8 @@
 
   service_->HandleNavigation(web_contents(), handle->GetPageTransition());
 
-  input_tracker_.Start(base::TimeDelta::FromSeconds(0));
+  input_tracker_.Start(
+      base::TimeDelta::FromSeconds(g_seconds_delay_after_navigation));
 }
 
 void SiteEngagementService::Helper::ReadyToCommitNavigation(