[ios] TabIdTabHelper

ios/chrome/browser/tabs/tab_helper_util.mm

Index: ios/chrome/browser/tabs/tab_helper_util.mm
diff --git a/ios/chrome/browser/tabs/tab_helper_util.mm b/ios/chrome/browser/tabs/tab_helper_util.mm
index e266138bd93bc80c74bbeca8983c41c0768956af..92f228e89ba301030d7ba96cd9355557bd3c2117 100644
--- a/ios/chrome/browser/tabs/tab_helper_util.mm
+++ b/ios/chrome/browser/tabs/tab_helper_util.mm
@@ -35,10 +35,13 @@
 #import "ios/chrome/browser/web/network_activity_indicator_tab_helper.h"
 #import "ios/chrome/browser/web/repost_form_tab_helper.h"
 #import "ios/chrome/browser/web/sad_tab_tab_helper.h"
+#import "ios/chrome/browser/web/tab_id_tab_helper.h"
 #import "ios/public/provider/chrome/browser/chrome_browser_provider.h"
 #import "ios/web/public/web_state/web_state.h"
 
 void AttachTabHelpers(web::WebState* web_state) {
+  // TabIDTabHelper provides the TabID, which is necessary in other helpers.

[Eugene But (OOO till 7-30), 2017/06/23 22:44:56]

nit: Does this comment add anything? 

[edchin, 2017/06/26 16:20:57]

Updated to be more specific. 

+  TabIDTabHelper::CreateForWebState(web_state);
   LegacyTabHelper::CreateForWebState(web_state);
   Tab* tab = LegacyTabHelper::GetTabForWebState(web_state);
   DCHECK(tab);
@@ -46,7 +49,7 @@ void AttachTabHelpers(web::WebState* web_state) {
   ios::ChromeBrowserState* browser_state =
       ios::ChromeBrowserState::FromBrowserState(web_state->GetBrowserState());
 
-  // IOSChromeSessionTabHelper comes first because it sets up the tab ID,
+  // IOSChromeSessionTabHelper comes first because it sets up the session ID,
   // and other helpers may rely on that.
   IOSChromeSessionTabHelper::CreateForWebState(web_state);