Tracing: Enable tracing_perftests on bots.

There is an intention to track TRACE_EVENT macros performance
without browser and it's designed exactly like cc_perftests.
See bug entry for details.

BUG=656029

Review-Url: https://codereview.chromium.org/2418983003
Cr-Commit-Position: refs/heads/master@{#427379}

BUILD.gn

@@ -960,6 +960,7 @@ group("chromium_builder_perf") {
       "//cc:cc_perftests",
       "//chrome/test:load_library_perf_tests",
       "//chrome/test:telemetry_perf_tests",
+      "//components/tracing:tracing_perftests",
       "//gpu:gpu_perftests",
       "//media:media_perftests",
       "//tools/perf/chrome_telemetry_build:telemetry_chrome_test",
@@ -976,9 +977,7 @@ group("chromium_builder_perf") {
         data_deps += [ "//chrome:linux_symbols" ]
       }
 
-      if (!is_chromeos) {
-        data_deps += [ "//tools/perf/clear_system_cache" ]
-      }
+      data_deps += [ "//tools/perf/clear_system_cache" ]
     }
 
     if (is_win) {

testing/buildbot/chromium.perf.json

@@ -119,6 +119,14 @@
         ],
         "name": "load_library_perf_tests",
         "script": "gtest_perf_test.py"
+      },
+      {
+        "args": [
+          "tracing_perftests",
+          "--test-launcher-print-test-stdio=always"
+        ],
+        "name": "tracing_perftests",
+        "script": "gtest_perf_test.py"
       }
     ]
   },

tools/perf/generate_perf_json.py

@@ -111,6 +111,20 @@
       ]
     }
   },
+  {
+    'args': [
+      'tracing_perftests',
+      '--test-launcher-print-test-stdio=always'
+    ],
+    'name': 'tracing_perftests',
+    'script': 'gtest_perf_test.py',
+    'testers': [
+      {
+        'name': 'Linux Perf',
+        'shards': [3]
+      },
+    ]
+  },
   {
     'args': [
       'load_library_perf_tests',