Fix incorrectly reported UMA OfflinePages.AggregatedRequestResult

chrome/browser/android/offline_pages/offline_page_request_job_unittest.cc

 // Copyright 2016 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/offline_pages/offline_page_request_job.h"
 
 #include "base/callback.h"
 #include "base/feature_list.h"
 #include "base/files/file_path.h"
 #include "base/memory/ptr_util.h"
@@ skipping 38 matching lines @@
 const GURL kTestUrl3WithFragment("http://test.org/page3#ref1");
 const ClientId kTestClientId = ClientId(kBookmarkNamespace, "1234");
 const ClientId kTestClientId2 = ClientId(kDownloadNamespace, "1a2b3c4d");
 const ClientId kTestClientId3 = ClientId(kDownloadNamespace, "3456abcd");
 const int kTestFileSize = 444;
 const int kTestFileSize2 = 450;
 const int kTestFileSize3 = 450;
 const int kTabId = 1;
 const int kBufSize = 1024;
 const char kAggregatedRequestResultHistogram[] =
-    "OfflinePages.AggregatedRequestResult";
+    "OfflinePages.AggregatedRequestResult2";
 
 class OfflinePageRequestJobTestDelegate :
     public OfflinePageRequestJob::Delegate {
  public:
   OfflinePageRequestJobTestDelegate(content::WebContents* web_content,
                                     int tab_id)
       : web_content_(web_content),
         tab_id_(tab_id) {}
 
   content::ResourceRequestInfo::WebContentsGetter
@@ skipping 740 matching lines @@
   ASSERT_TRUE(offline_page_tab_helper()->GetOfflinePageForTest());
   EXPECT_EQ(offline_id3(),
             offline_page_tab_helper()->GetOfflinePageForTest()->offline_id);
   ExpectAggregatedRequestResultHistogramWithCount(
       OfflinePageRequestJob::AggregatedRequestResult::
           SHOW_OFFLINE_ON_DISCONNECTED_NETWORK, 3);
 
 }
 
 }  // namespace offline_pages