[ios] Adds LocationBarCoordinator.

ios/shared/chrome/browser/ui/browser_list/browser_web_state_list_delegate.mm

Index: ios/shared/chrome/browser/ui/browser_list/browser_web_state_list_delegate.mm
diff --git a/ios/shared/chrome/browser/ui/browser_list/browser_web_state_list_delegate.mm b/ios/shared/chrome/browser/ui/browser_list/browser_web_state_list_delegate.mm
index ce96f43de90f3e4cdff5037c79b893465a5f88fd..2b166dd87e7fa1423a9cae864a92baa7eb6e6225 100644
--- a/ios/shared/chrome/browser/ui/browser_list/browser_web_state_list_delegate.mm
+++ b/ios/shared/chrome/browser/ui/browser_list/browser_web_state_list_delegate.mm
@@ -5,6 +5,8 @@
 #import "ios/shared/chrome/browser/ui/browser_list/browser_web_state_list_delegate.h"
 
 #include "base/logging.h"
+#import "ios/chrome/browser/sessions/ios_chrome_session_tab_helper.h"
+#import "ios/chrome/browser/ssl/ios_security_state_tab_helper.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
@@ -17,6 +19,9 @@ BrowserWebStateListDelegate::BrowserWebStateListDelegate(Browser* browser)
 
 BrowserWebStateListDelegate::~BrowserWebStateListDelegate() = default;
 
-void BrowserWebStateListDelegate::WillAddWebState(web::WebState* web_state) {}
+void BrowserWebStateListDelegate::WillAddWebState(web::WebState* web_state) {
+  IOSChromeSessionTabHelper::CreateForWebState(web_state);

[marq (ping after 24h), 2017/04/05 09:07:19]

Is this needed for this CL?

Is your thinking that this is the right place to add tab helpers?

[rohitrao (ping after 24h), 2017/04/05 14:37:05]

The omnibox requires these two helpers to exist.  Long-term, I'd like to attach
tab helpers in this method, but that will happen through a call to the
AttachTabHelpers() function.

For now, I don't want to bring up every helper (which would also create Tab
objects), so I'm manually creating the ones we need.

+  IOSSecurityStateTabHelper::CreateForWebState(web_state);
+}
 
 void BrowserWebStateListDelegate::WebStateDetached(web::WebState* web_state) {}