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

chrome/browser/tab_contents/link_infobar_delegate.cc

-// Copyright (c) 2011 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.
-
-#include "chrome/browser/tab_contents/link_infobar_delegate.h"
-
-bool LinkInfoBarDelegate::LinkClicked(WindowOpenDisposition disposition) {
-  return true;
-}
-
-LinkInfoBarDelegate::LinkInfoBarDelegate(InfoBarTabHelper* infobar_helper)
-    : InfoBarDelegate(infobar_helper) {
-}
-
-LinkInfoBarDelegate::~LinkInfoBarDelegate() {
-}
-
-LinkInfoBarDelegate* LinkInfoBarDelegate::AsLinkInfoBarDelegate() {
-  return this;
-}