Migrate device_utils.RestartServer to adb_wrapper

build/android/pylib/device/device_utils_test.py

Index: build/android/pylib/device/device_utils_test.py
diff --git a/build/android/pylib/device/device_utils_test.py b/build/android/pylib/device/device_utils_test.py
index 512a7d4b2fc58c6e8128e765cfc940ced8baf282..d4b081127a35f3bed29c08a2b749c0883a166972 100755
--- a/build/android/pylib/device/device_utils_test.py
+++ b/build/android/pylib/device/device_utils_test.py
@@ -69,6 +69,22 @@ class DeviceUtilsTest(unittest.TestCase):
       device_utils.DeviceUtils('')
 
 
+class DeviceUtilsRestartServerTest(mock_calls.TestCase):
+
+  @mock.patch('time.sleep', mock.Mock())
+  def testRestartServer_succeeds(self):
+    with self.assertCalls(
+        mock.call.pylib.device.adb_wrapper.AdbWrapper.KillServer(),
+        (mock.call.pylib.cmd_helper.GetCmdStatusAndOutput(['pgrep', 'adb']),
+         (1, '')),
+        mock.call.pylib.device.adb_wrapper.AdbWrapper.StartServer(),
+        (mock.call.pylib.cmd_helper.GetCmdStatusAndOutput(['pgrep', 'adb']),
+         (1, '')),
+        (mock.call.pylib.cmd_helper.GetCmdStatusAndOutput(['pgrep', 'adb']),
+         (0, '123\n'))):
+      device_utils.RestartServer()
+
+
 class MockTempFile(object):
 
   def __init__(self, name='/tmp/some/file'):