Create chrome/browser/api directory. Move infobar delegates used by Autofill to the directory.

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

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_UI_COCOA_INFOBARS_INFOBAR_GRADIENT_VIEW_H_
 #define CHROME_BROWSER_UI_COCOA_INFOBARS_INFOBAR_GRADIENT_VIEW_H_
 
-#include "chrome/browser/infobars/infobar_delegate.h"
+#include "chrome/browser/api/infobars/infobar_delegate.h"
 #import "chrome/browser/ui/cocoa/vertical_gradient_view.h"
 
 #import <Cocoa/Cocoa.h>
 
 // A custom view that draws the background gradient for an infobar.
 @interface InfoBarGradientView : VerticalGradientView {
  @private
   NSPoint tipApex_;
 }
 
 // The point, in window coordinates, at which the infobar tip is the highest and
 // pointing at the omnibox decoration.
 @property(assign, nonatomic) NSPoint tipApex;
 
 // Sets the infobar type. This will change the view's gradient.
 - (void)setInfobarType:(InfoBarDelegate::Type)infobarType;
 
 @end
 
 #endif  // CHROME_BROWSER_UI_COCOA_INFOBARS_INFOBAR_GRADIENT_VIEW_H_