Add method for identifying different InfoBars

chrome/browser/android/download/android_download_manager_overwrite_infobar_delegate.cc

 // Copyright 2015 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/android/download/android_download_manager_overwrite_infobar_delegate.h"
 
 #include "base/android/jni_string.h"
 #include "base/files/file_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/stringprintf.h"
@@ skipping 35 matching lines @@
         jobject chrome_download_delegate,
         jobject download_info)
     : file_name_(file_name),
       dir_name_(dir_name),
       dir_full_path_(dir_full_path) {
   JNIEnv* env = base::android::AttachCurrentThread();
   chrome_download_delegate_.Reset(env, chrome_download_delegate);
   download_info_.Reset(env, download_info);
 }
 
+std::string
+AndroidDownloadManagerOverwriteInfoBarDelegate::GetIdentifier() const {
+  return "AndroidDownloadManagerOverwriteInfoBarDelegate";
+}
+
 bool AndroidDownloadManagerOverwriteInfoBarDelegate::OverwriteExistingFile() {
   bool tab_closed = ChromeDownloadDelegate::EnqueueDownloadManagerRequest(
       chrome_download_delegate_.obj(), true, download_info_.obj());
   return !tab_closed;
 }
 
 bool AndroidDownloadManagerOverwriteInfoBarDelegate::CreateNewFile() {
   bool tab_closed = ChromeDownloadDelegate::EnqueueDownloadManagerRequest(
       chrome_download_delegate_.obj(), false, download_info_.obj());
   return !tab_closed;
 }
 
 std::string AndroidDownloadManagerOverwriteInfoBarDelegate::GetFileName()
     const {
   return file_name_;
 }
 
 std::string AndroidDownloadManagerOverwriteInfoBarDelegate::GetDirName() const {
   return dir_name_;
 }
 
 std::string AndroidDownloadManagerOverwriteInfoBarDelegate::GetDirFullPath()
     const {
   return dir_full_path_;
 }
 
 }  // namespace android
 }  // namespace chrome