Add mojo_js_integration_tests and mojo_js_unittests to waterfall and trybot.

testing/buildbot/chromium.linux.json

 {
   "Android GN": {
     "additional_compile_targets": [
       "all"
     ],
     "gtest_tests": [
       {
         "test": "android_webview_unittests"
       },
       {
@@ skipping 524 matching lines @@
         },
         "test": "midi_unittests"
       },
       {
         "swarming": {
           "can_use_on_swarming_builders": true
         },
         "test": "mojo_common_unittests"
       },
       {
+        "test": "mojo_js_integration_tests"
+      },
+      {
+        "test": "mojo_js_unittests"
+      },
+      {
         "test": "mojo_public_application_unittests"
       },
       {
         "swarming": {
           "can_use_on_swarming_builders": true
         },
         "test": "mojo_public_bindings_unittests"
       },
       {
         "swarming": {
@@ skipping 868 matching lines @@
       }
     ],
     "scripts": [
       {
         "name": "nacl_integration",
         "script": "nacl_integration.py"
       }
     ]
   }
 }