Adding capture unittests to webcam-equipped WebRTC bots.

scripts/slave/recipes/chromium.expected/full_chromium_webrtc_Linux_Tester.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "\nimport sys, os\npath = sys.argv[1]\nmode = int(sys.argv[2])\nif not os.path.isdir(path):\n  if os.path.exists(path):\n    print \"%s exists but is not a dir\" % path\n    sys.exit(1)\n  os.makedirs(path, mode)\n",
       "[BUILDER_CACHE]/Linux_Tester",
       "511"
     ],
     "name": "makedirs checkout path",
@@ skipping 371 matching lines @@
       "-u",
       "RECIPE_PACKAGE_REPO[build]/scripts/slave/runtest.py",
       "--target",
       "Release",
       "--xvfb",
       "--factory-properties",
       "{\"blamelist\": [\"cool_dev1337@chromium.org\", \"hax@chromium.org\"], \"build_data_dir\": \"[ROOT]/build_data_dir\", \"buildername\": \"Linux Tester\", \"buildnumber\": 571, \"mastername\": \"chromium.webrtc\", \"parent_build_archive_url\": \"gs://test-domain/test-archive.zip\", \"parent_buildername\": \"Linux Builder\", \"parent_got_revision\": \"1111111\", \"path_config\": \"kitchen\", \"recipe\": \"chromium\", \"slavename\": \"TestSlavename\", \"workdir\": \"/path/to/workdir/TestSlavename\"}",
       "--build-properties",
       "{\"blamelist\": [\"cool_dev1337@chromium.org\", \"hax@chromium.org\"], \"build_data_dir\": \"[ROOT]/build_data_dir\", \"buildername\": \"Linux Tester\", \"buildnumber\": 571, \"mastername\": \"chromium.webrtc\", \"parent_build_archive_url\": \"gs://test-domain/test-archive.zip\", \"parent_buildername\": \"Linux Builder\", \"parent_got_revision\": \"1111111\", \"path_config\": \"kitchen\", \"recipe\": \"chromium\", \"slavename\": \"TestSlavename\", \"workdir\": \"/path/to/workdir/TestSlavename\"}",
       "--annotate=gtest",
+      "--test-type=capture_unittests",
+      "--step-name=capture_unittests",
+      "--test-launcher-summary-output",
+      "/path/to/tmp/json",
+      "--builder-name=Linux Tester",
+      "--slave-name=TestSlavename",
+      "--build-number=571",
+      "capture_unittests"
+    ],
+    "cwd": "[BUILDER_CACHE]/Linux_Tester",
+    "env": {
+      "GOMA_SERVICE_ACCOUNT_JSON_FILE": "/creds/service_accounts/service-account-goma-client.json"
+    },
+    "name": "capture_unittests"
+  },
+  {
+    "allow_subannotations": true,
+    "cmd": [
+      "python",
+      "-u",
+      "RECIPE_PACKAGE_REPO[build]/scripts/slave/runtest.py",
+      "--target",
+      "Release",
+      "--xvfb",
+      "--factory-properties",
+      "{\"blamelist\": [\"cool_dev1337@chromium.org\", \"hax@chromium.org\"], \"build_data_dir\": \"[ROOT]/build_data_dir\", \"buildername\": \"Linux Tester\", \"buildnumber\": 571, \"mastername\": \"chromium.webrtc\", \"parent_build_archive_url\": \"gs://test-domain/test-archive.zip\", \"parent_buildername\": \"Linux Builder\", \"parent_got_revision\": \"1111111\", \"path_config\": \"kitchen\", \"recipe\": \"chromium\", \"slavename\": \"TestSlavename\", \"workdir\": \"/path/to/workdir/TestSlavename\"}",
+      "--build-properties",
+      "{\"blamelist\": [\"cool_dev1337@chromium.org\", \"hax@chromium.org\"], \"build_data_dir\": \"[ROOT]/build_data_dir\", \"buildername\": \"Linux Tester\", \"buildnumber\": 571, \"mastername\": \"chromium.webrtc\", \"parent_build_archive_url\": \"gs://test-domain/test-archive.zip\", \"parent_buildername\": \"Linux Builder\", \"parent_got_revision\": \"1111111\", \"path_config\": \"kitchen\", \"recipe\": \"chromium\", \"slavename\": \"TestSlavename\", \"workdir\": \"/path/to/workdir/TestSlavename\"}",
+      "--annotate=gtest",
       "--test-type=content_unittests",
       "--step-name=content_unittests",
       "--test-launcher-summary-output",
       "/path/to/tmp/json",
       "--builder-name=Linux Tester",
       "--slave-name=TestSlavename",
       "--build-number=571",
       "content_unittests"
     ],
     "cwd": "[BUILDER_CACHE]/Linux_Tester",
@@ skipping 65 matching lines @@
       "GOMA_SERVICE_ACCOUNT_JSON_FILE": "/creds/service_accounts/service-account-goma-client.json"
     },
     "name": "remoting_unittests"
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]