Display telemetry chartjson output and result data on waterfall.

scripts/slave/recipes/chromium.py

Index: scripts/slave/recipes/chromium.py
diff --git a/scripts/slave/recipes/chromium.py b/scripts/slave/recipes/chromium.py
index c544ca1fc3ead37ff3b7335f8cb1743f00c58189..a86d68edc7e79a707cc1aaf147b9abd9ebee9b00 100644
--- a/scripts/slave/recipes/chromium.py
+++ b/scripts/slave/recipes/chromium.py
@@ -346,3 +346,25 @@ def GenTests(api):
     api.override_step_data(
         'blink_perf.all.release', retcode=1)
   )
+
+  yield (
+    api.test('test_chartjson_enabled') +
+    api.properties.generic(mastername='chromium.perf',
+                           buildername='Linux Perf (1)',
+                           parent_buildername='Linux Builder',
+                           buildnumber=0) +
+    api.platform('linux', 64) +
+    api.override_step_data(
+        'List Perf Tests',
+        api.json.output({
+          "steps": {
+            "blink_perf.all.exact": {
+              "cmd": "/usr/bin/python /path/to/run_benmark --a=1 -v --b=2",
+              "perf_dashboard_id": "blink_perf.all",
+              "device_affinity": 0,
+              "chartjson_file": True
+            }
+          },
+          "version": 2,
+        }))
+  )