Introduce InfoBarTabService API.

chrome/browser/ui/cocoa/infobars/infobar_controller.mm

Index: chrome/browser/ui/cocoa/infobars/infobar_controller.mm
diff --git a/chrome/browser/ui/cocoa/infobars/infobar_controller.mm b/chrome/browser/ui/cocoa/infobars/infobar_controller.mm
index d7b584d0f57e290c9c8991c4c6a2f35051c39d3a..aa8fd060e7268bff592dc699132352ada61b3f12 100644
--- a/chrome/browser/ui/cocoa/infobars/infobar_controller.mm
+++ b/chrome/browser/ui/cocoa/infobars/infobar_controller.mm
@@ -451,14 +451,16 @@ const float kAnimateCloseDuration = 0.12;
 //////////////////////////////////////////////////////////////////////////
 // CreateInfoBar() implementations
 
-InfoBar* LinkInfoBarDelegate::CreateInfoBar(InfoBarTabHelper* owner) {
+InfoBar* LinkInfoBarDelegate::CreateInfoBar(InfoBarTabService* owner) {
+  InfoBarTabHelper* helper = (InfoBarTabHelper*)owner;
   LinkInfoBarController* controller =
-      [[LinkInfoBarController alloc] initWithDelegate:this owner:owner];
+      [[LinkInfoBarController alloc] initWithDelegate:this owner:helper];
   return new InfoBar(controller, this);
 }
 
-InfoBar* ConfirmInfoBarDelegate::CreateInfoBar(InfoBarTabHelper* owner) {
+InfoBar* ConfirmInfoBarDelegate::CreateInfoBar(InfoBarTabService* owner) {
+  InfoBarTabHelper* helper = (InfoBarTabHelper*)owner;
   ConfirmInfoBarController* controller =
-      [[ConfirmInfoBarController alloc] initWithDelegate:this owner:owner];
+      [[ConfirmInfoBarController alloc] initWithDelegate:this owner:helper];
   return new InfoBar(controller, this);
 }