Add method for identifying different InfoBars

chrome/browser/net/spdyproxy/data_reduction_proxy_infobar_delegate_android.h

 // 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.
 
 #ifndef CHROME_BROWSER_NET_SPDYPROXY_DATA_REDUCTION_PROXY_INFOBAR_DELEGATE_ANDROID_H_
 #define CHROME_BROWSER_NET_SPDYPROXY_DATA_REDUCTION_PROXY_INFOBAR_DELEGATE_ANDROID_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "components/infobars/core/confirm_infobar_delegate.h"
@@ skipping 21 matching lines @@
  private:
   explicit DataReductionProxyInfoBarDelegateAndroid(
       const std::string& link_url);
 
   // Returns a Data Reduction Proxy infobar that owns |delegate|.
   static scoped_ptr<infobars::InfoBar> CreateInfoBar(
       infobars::InfoBarManager* infobar_manager,
       scoped_ptr<DataReductionProxyInfoBarDelegateAndroid> delegate);
 
   // ConfirmInfoBarDelegate
+  std::string GetIdentifier() const override;
   bool ShouldExpire(const NavigationDetails& details) const override;
   base::string16 GetMessageText() const override;
   int GetButtons() const override;
   GURL GetLinkURL() const override;
   bool LinkClicked(WindowOpenDisposition disposition) override;
 
   std::string link_url_;
 
   DISALLOW_COPY_AND_ASSIGN(DataReductionProxyInfoBarDelegateAndroid);
 };
 
 #endif  // CHROME_BROWSER_NET_SPDYPROXY_DATA_REDUCTION_PROXY_INFOBAR_DELEGATE_ANDROID_H_