Shard & set hard timeout for telemetry_perf_unittests

testing/buildbot/chromium.linux.json

 {
   "Android Arm64 Builder (dbg)": {
     "additional_compile_targets": [
       "all"
     ]
   },
   "Android Builder": {
     "additional_compile_targets": [
       "cronet_test_instrumentation_apk",
       "system_webview_apk"
@@ skipping 602 matching lines @@
         ],
         "swarming": {
           "can_use_on_swarming_builders": true,
           "dimension_sets": [
             {
               "android_devices": "4",
               "device_os": "KTU84P",
               "device_type": "hammerhead"
             }
           ],
-          "hard_timeout": 1920
+          "hard_timeout": 960,
+          "shards": 12

[jbudorick, 2016/06/23 13:13:55]

What was the motivation here?

This is _really_ problematic for capacity & should likely be backed out.

[nednguyen, 2016/06/23 13:18:28]

Oh, this is just meant to make it consistent with other telemetry configurations
on other platform. Do we have capacity monitoring? I can adjust the number of
tests run to keep it under our budget.

[ghost stip (do not use), 2016/06/23 14:03:58]

we are currently at negative capacity. we need to crank this back to 1 until we
stabilize.

         }
       }
     ],
     "junit_tests": [
       {
         "test": "base_junit_tests"
       },
       {
         "test": "chrome_junit_tests"
       },
@@ skipping 837 matching lines @@
       {
         "args": [
           "--xvfb"
         ],
         "isolate_name": "telemetry_perf_unittests",
         "name": "telemetry_perf_unittests",
         "override_compile_targets": [
           "telemetry_perf_unittests_run"
         ],
         "swarming": {
-          "can_use_on_swarming_builders": true
+          "can_use_on_swarming_builders": true,
+          "hard_timeout": 960,
+          "shards": 12
         }
       },
       {
         "isolate_name": "telemetry_unittests",
         "name": "telemetry_unittests",
         "override_compile_targets": [
           "telemetry_unittests_run"
         ],
         "swarming": {
           "can_use_on_swarming_builders": true
@@ skipping 398 matching lines @@
       {
         "args": [
           "--xvfb"
         ],
         "isolate_name": "telemetry_perf_unittests",
         "name": "telemetry_perf_unittests",
         "override_compile_targets": [
           "telemetry_perf_unittests_run"
         ],
         "swarming": {
-          "can_use_on_swarming_builders": true
+          "can_use_on_swarming_builders": true,
+          "hard_timeout": 960,
+          "shards": 12
         }
       },
       {
         "isolate_name": "telemetry_unittests",
         "name": "telemetry_unittests",
         "override_compile_targets": [
           "telemetry_unittests_run"
         ],
         "swarming": {
           "can_use_on_swarming_builders": true
@@ skipping 356 matching lines @@
         "override_compile_targets": [
           "telemetry_unittests_run"
         ],
         "swarming": {
           "can_use_on_swarming_builders": true
         }
       }
     ]
   }
 }