Add method for identifying different InfoBars

chrome/browser/net/spdyproxy/data_reduction_proxy_infobar_delegate_android.cc

 // Copyright 2014 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/net/spdyproxy/data_reduction_proxy_infobar_delegate_android.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/infobars/infobar_service.h"
 #include "components/infobars/core/infobar.h"
 #include "components/infobars/core/infobar_delegate.h"
@@ skipping 15 matching lines @@
               new DataReductionProxyInfoBarDelegateAndroid(link_url))));
 }
 
 DataReductionProxyInfoBarDelegateAndroid::
     ~DataReductionProxyInfoBarDelegateAndroid() {}
 
 DataReductionProxyInfoBarDelegateAndroid::
     DataReductionProxyInfoBarDelegateAndroid(const std::string& link_url)
     : ConfirmInfoBarDelegate(), link_url_(link_url) {}
 
+infobars::InfoBarDelegate::InfoBarIdentifier
+DataReductionProxyInfoBarDelegateAndroid::GetIdentifier() const {
+  return DATA_REDUCTION_PROXY_INFOBAR_DELEGATE_ANDROID;
+}
+
 bool DataReductionProxyInfoBarDelegateAndroid::ShouldExpire(
     const NavigationDetails& details) const {
   return false;
 }
 
 base::string16 DataReductionProxyInfoBarDelegateAndroid::GetMessageText()
     const {
   return base::string16();
 }
 
 int DataReductionProxyInfoBarDelegateAndroid::GetButtons() const {
   return BUTTON_NONE;
 }
 
 GURL DataReductionProxyInfoBarDelegateAndroid::GetLinkURL() const {
   return GURL(link_url_);
 }
 
 bool DataReductionProxyInfoBarDelegateAndroid::LinkClicked(
     WindowOpenDisposition disposition) {
   ConfirmInfoBarDelegate::LinkClicked(disposition);
   return true;
 }