Wire up download attribution enable finch experiment

chrome/browser/ui/tab_helpers.cc

Index: chrome/browser/ui/tab_helpers.cc
diff --git a/chrome/browser/ui/tab_helpers.cc b/chrome/browser/ui/tab_helpers.cc
index 74e762cf20c2e4276b868ce290ef36326b2ee490..6bb2b451c0c14fdd400135ebb688858be108146d 100644
--- a/chrome/browser/ui/tab_helpers.cc
+++ b/chrome/browser/ui/tab_helpers.cc
@@ -32,6 +32,7 @@
 #include "chrome/browser/prerender/prerender_tab_helper.h"
 #include "chrome/browser/previews/previews_infobar_tab_helper.h"
 #include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/safe_browsing/safe_browsing_service.h"
 #include "chrome/browser/sessions/session_tab_helper.h"
 #include "chrome/browser/ssl/security_state_tab_helper.h"
 #include "chrome/browser/subresource_filter/chrome_subresource_filter_client.h"
@@ -77,6 +78,8 @@
 #else
 #include "chrome/browser/banners/app_banner_manager_desktop.h"
 #include "chrome/browser/plugins/plugin_observer.h"
+#include "chrome/browser/safe_browsing/safe_browsing_navigation_observer.h"
+#include "chrome/browser/safe_browsing/safe_browsing_navigation_observer_manager.h"
 #include "chrome/browser/safe_browsing/safe_browsing_tab_observer.h"
 #include "chrome/browser/thumbnails/thumbnail_tab_helper.h"
 #include "chrome/browser/ui/bookmarks/bookmark_tab_helper.h"
@@ -228,6 +231,13 @@ void TabHelpers::AttachTabHelpers(WebContents* web_contents) {
   PluginObserver::CreateForWebContents(web_contents);
   SadTabHelper::CreateForWebContents(web_contents);
   safe_browsing::SafeBrowsingTabObserver::CreateForWebContents(web_contents);
+  if (safe_browsing::SafeBrowsingNavigationObserverManager::IsEnabledAndReady(
+        Profile::FromBrowserContext(web_contents->GetBrowserContext()))) {
+    safe_browsing::SafeBrowsingNavigationObserver::CreateForWebContents(
+        web_contents,
+        g_browser_process->safe_browsing_service()
+            ->navigation_observer_manager());
+  }
   TabContentsSyncedTabDelegate::CreateForWebContents(web_contents);
   TabDialogs::CreateForWebContents(web_contents);
   ThumbnailTabHelper::CreateForWebContents(web_contents);