Move Infobars core files to the Infobars component

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

Index: chrome/browser/ui/cocoa/infobars/infobar_controller.h
diff --git a/chrome/browser/ui/cocoa/infobars/infobar_controller.h b/chrome/browser/ui/cocoa/infobars/infobar_controller.h
index 7755dab06851b1997b2b66b49fa02f5eb06d237c..ae458794b1702d5bf290483c58c0429e3914f014 100644
--- a/chrome/browser/ui/cocoa/infobars/infobar_controller.h
+++ b/chrome/browser/ui/cocoa/infobars/infobar_controller.h
@@ -9,10 +9,13 @@
 
 @protocol InfoBarContainerControllerBase;
 class InfoBarCocoa;
-class InfoBarDelegate;
 class InfoBarService;
 @class InfoBarGradientView;
 
+namespace infobars {
+class InfoBarDelegate;
+}
+
 // A controller for an infobar in the browser window.  There is one
 // controller per infobar view.  The base InfoBarController is able to
 // draw an icon, a text message, and a close button.  Subclasses can
@@ -39,7 +42,7 @@ class InfoBarService;
 
 @property(nonatomic, assign)
     id<InfoBarContainerControllerBase> containerController;
-@property(nonatomic, readonly) InfoBarDelegate* delegate;
+@property(nonatomic, readonly) infobars::InfoBarDelegate* delegate;
 @property(nonatomic, readonly) InfoBarCocoa* infobar;
 
 // Initializes a new InfoBarController and takes a WeakPtr to |infobar|.