Support getting and deleting token for Instance ID.

components/gcm_driver/gcm_stats_recorder_impl_unittest.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 "components/gcm_driver/gcm_stats_recorder_impl.h"
 
 #include <deque>
 #include <string>
 #include <vector>
 
@@ skipping 320 matching lines @@
       const std::deque<SendingActivity>& queue,
       const std::string& event, const std::string& details,
       const std::string& remark) {
     EXPECT_EQ(kAppId, queue.front().app_id) << remark;
     EXPECT_EQ(kReceiverId, queue.front().receiver_id) << remark;
     EXPECT_EQ(kMessageId, queue.front().message_id) << remark;
     EXPECT_EQ(event, queue.front().event) << remark;
     EXPECT_EQ(details, queue.front().details) << remark;
   }
 
-  std::vector<std::string> sender_ids_;
+  std::string sender_ids_;
   GCMStatsRecorderImpl recorder_;
 };
 
 GCMStatsRecorderImplTest::GCMStatsRecorderImplTest(){
 }
 
 GCMStatsRecorderImplTest::~GCMStatsRecorderImplTest() {}
 
 void GCMStatsRecorderImplTest::SetUp(){
-  sender_ids_.push_back("s1");
-  sender_ids_.push_back("s2");
+  sender_ids_ = "s1,s2";
   recorder_.SetRecording(true);
 }
 
 TEST_F(GCMStatsRecorderImplTest, StartStopRecordingTest) {
   EXPECT_TRUE(recorder_.is_recording());
   recorder_.RecordDataSentToWire(kAppId, kReceiverId, kMessageId, kQueuedSec);
   VerifyRecordedSendingCount(1);
   VerifyDataSentToWire("1st call");
 
   recorder_.SetRecording(false);
@@ skipping 153 matching lines @@
   recorder_.RecordIncomingSendError(kAppId, kReceiverId, kMessageId);
   VerifyRecordedSendingCount(3);
   VerifyIncomingSendError("3rd call");
 
   recorder_.RecordDataSentToWire(kAppId, kReceiverId, kMessageId, kQueuedSec);
   VerifyRecordedSendingCount(4);
   VerifyDataSentToWire("4th call");
 }
 
 }  // namespace gcm