Move Infobars core files to the Infobars component

chrome/browser/ui/cocoa/infobars/infobar_container_controller.h

Index: chrome/browser/ui/cocoa/infobars/infobar_container_controller.h
diff --git a/chrome/browser/ui/cocoa/infobars/infobar_container_controller.h b/chrome/browser/ui/cocoa/infobars/infobar_container_controller.h
index d8044c55598c8e19bdc141326f202b5b61af7bd1..59431444d15a32d1faf104fd08450cfa59295479 100644
--- a/chrome/browser/ui/cocoa/infobars/infobar_container_controller.h
+++ b/chrome/browser/ui/cocoa/infobars/infobar_container_controller.h
@@ -15,13 +15,16 @@
 @class InfoBarController;
 class InfoBarCocoa;
 class InfoBarContainerCocoa;
-class InfoBarDelegate;
 class TabStripModel;
 
 namespace content {
 class WebContents;
 }
 
+namespace infobars {
+class InfoBarDelegate;
+}
+
 // Protocol for basic container methods, as needed by an InfoBarController.
 // This protocol exists to make mocking easier in unittests.
 @protocol InfoBarContainerControllerBase