Sync performance tests: include datatype in trace label for performance graphs.

chrome/test/live_sync/performance/sessions_sync_perf_test.cc

 // Copyright (c) 2011 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 "base/stringprintf.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/sync/profile_sync_service_harness.h"
 #include "chrome/test/live_sync/performance/sync_timing_helper.h"
 #include "chrome/test/live_sync/live_sessions_sync_test.h"
 
@@ skipping 89 matching lines @@
 }
 
 IN_PROC_BROWSER_TEST_F(SessionsSyncPerfTest, P0) {
   ASSERT_TRUE(SetupSync()) << "SetupSync() failed.";
 
   AddTabs(0, kNumTabs);
   base::TimeDelta dt =
       SyncTimingHelper::TimeMutualSyncCycle(GetClient(0), GetClient(1));
   ASSERT_EQ(kNumTabs, GetTabCount(0));
   ASSERT_EQ(kNumTabs, GetTabCount(1));
-  SyncTimingHelper::PrintResult("tabs", "add", dt);
+  SyncTimingHelper::PrintResult("tabs", "add_tabs", dt);
 
   UpdateTabs(0);
   dt = SyncTimingHelper::TimeMutualSyncCycle(GetClient(0), GetClient(1));
   ASSERT_EQ(kNumTabs, GetTabCount(0));
   ASSERT_EQ(kNumTabs, GetTabCount(1));
-  SyncTimingHelper::PrintResult("tabs", "update", dt);
+  SyncTimingHelper::PrintResult("tabs", "update_tabs", dt);
 
   RemoveTabs(0);
   dt = SyncTimingHelper::TimeMutualSyncCycle(GetClient(0), GetClient(1));
   // New tab page remains open on profile 0 after closing all tabs.
   ASSERT_EQ(1, GetTabCount(0));
   ASSERT_EQ(0, GetTabCount(1));
-  SyncTimingHelper::PrintResult("tabs", "delete", dt);
+  SyncTimingHelper::PrintResult("tabs", "delete_tabs", dt);
 }