[Telemetry] Set the number of processes to use for telemetry_unittests on win platform to be 1

chrome/telemetry_unittests.isolate

Index: chrome/telemetry_unittests.isolate
diff --git a/chrome/telemetry_unittests.isolate b/chrome/telemetry_unittests.isolate
index f91ea698a5736d297fb45b8c7955ee9fea85cf3c..fb8c4015ba4e7f9c9cf6cbfb38f5fbd2769a3b98 100644
--- a/chrome/telemetry_unittests.isolate
+++ b/chrome/telemetry_unittests.isolate
@@ -15,12 +15,31 @@
           '../testing/scripts/common.py',
           '../testing/scripts/run_telemetry_as_googletest.py',
         ],
+      }
+    }],
+    ['OS=="mac"', {
+      'variables': {
+        'command': [
+          '../testing/scripts/run_telemetry_as_googletest.py',
+          '../tools/telemetry/run_tests',
+          '-v',
+          '--chrome-root',
+          '..',
+        ],
+      },
+    }],
+    ['OS=="win"', {
+      'variables': {
         'command': [
           '../testing/scripts/run_telemetry_as_googletest.py',
           '../tools/telemetry/run_tests',
           '-v',
           '--chrome-root',
-          '..'
+          '..',
+          # crbug.com/559154
+          # TODO(nednguyen): Remove --jobs=1 once the bug is fixed to speed up
+          # the test run.
+          '--job=1',
         ],
       },
     }],