Add json test results format support for SwarmingIsolatedScriptTest

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 dc683f220d496a3c871326f9137982ef38c89fc5..e0146cdbc4fe5dae7c21035f3a759520ac60d3b6 100644
--- a/scripts/slave/recipes/chromium.py
+++ b/scripts/slave/recipes/chromium.py
@@ -500,7 +500,41 @@ def GenTests(api):
         api.test_utils.canned_isolated_script_output(
             passing=True, is_win=False, swarming=True,
             shards=2, isolated_script_passing=True, valid=True,
-            output_chartjson=True),
+            use_json_test_format=True, output_chartjson=True),
+        retcode=0)
+  )
+
+  yield (
+    api.test('dynamic_swarmed_sharded_invalid_format_isolated_script_test') +
+    api.properties.generic(mastername='chromium.linux',
+                           buildername='Linux Tests',
+                           parent_buildername='Linux Builder') +
+    api.properties(swarm_hashes={
+      'telemetry_gpu_unittests': 'eeeeeeeeeeeeeeeeeeeeeeeeeeeeee',
+    }) +
+    api.platform('linux', 64) +
+    api.override_step_data(
+        'read test spec (chromium.linux.json)',
+        api.json.output({
+            'Linux Tests': {
+                'isolated_scripts': [
+                    {
+                        'isolate_name': 'telemetry_gpu_unittests',
+                        'name': 'telemetry_gpu_unittests',
+                        'swarming': {
+                            'can_use_on_swarming_builders': True,
+                            'shards': 3,
+                        },
+                    },
+                ],
+            },
+        })
+    ) +
+    api.override_step_data('telemetry_gpu_unittests on Ubuntu-12.04',
+        api.test_utils.canned_isolated_script_output(
+            passing=True, is_win=False, swarming=True,
+            shards=3, isolated_script_passing=True, valid=False,
+            use_json_test_format=True, output_chartjson=True),
         retcode=0)
   )
 
@@ -533,8 +567,8 @@ def GenTests(api):
     api.override_step_data('telemetry_gpu_unittests on Ubuntu-12.04',
         api.test_utils.canned_isolated_script_output(
             passing=False, is_win=False, swarming=True,
-            shards=2, isolated_script_passing=False, valid=True),
-            retcode=1)
+            shards=2, isolated_script_passing=False, valid=True,
+            use_json_test_format=True), retcode=1)
   )
 
   yield (