Revert of Migrate device_utils.RestartServer to adb_wrapper

build/android/pylib/device/adb_wrapper.py

Index: build/android/pylib/device/adb_wrapper.py
diff --git a/build/android/pylib/device/adb_wrapper.py b/build/android/pylib/device/adb_wrapper.py
index 7d761f16a53f1fecfd07badef849ef364853cf12..4006a21d5540611c5e23aa72f2b838293b5efadc 100644
--- a/build/android/pylib/device/adb_wrapper.py
+++ b/build/android/pylib/device/adb_wrapper.py
@@ -56,12 +56,8 @@
 
   # pylint: disable=unused-argument
   @classmethod
-  def _BuildAdbCmd(cls, args, device_serial, cpu_affinity=None):
-    if cpu_affinity is not None:
-      cmd = ['taskset', '-c', str(cpu_affinity)]
-    else:
-      cmd = []
-    cmd.append(constants.GetAdbPath())
+  def _BuildAdbCmd(cls, args, device_serial):
+    cmd = [constants.GetAdbPath()]
     if device_serial is not None:
       cmd.extend(['-s', device_serial])
     cmd.extend(args)
@@ -72,9 +68,9 @@
   @classmethod
   @decorators.WithTimeoutAndRetries
   def _RunAdbCmd(cls, args, timeout=None, retries=None, device_serial=None,
-                 check_error=True, cpu_affinity=None):
+                 check_error=True):
     status, output = cmd_helper.GetCmdStatusAndOutputWithTimeout(
-        cls._BuildAdbCmd(args, device_serial, cpu_affinity=cpu_affinity),
+        cls._BuildAdbCmd(args, device_serial),
         timeout_retry.CurrentTimeoutThread().GetRemainingTime())
     if status != 0:
       raise device_errors.AdbCommandFailedError(
@@ -138,16 +134,6 @@
 
   def __repr__(self):
     return '%s(\'%s\')' % (self.__class__.__name__, self)
-
-  @classmethod
-  def KillServer(cls, timeout=_DEFAULT_TIMEOUT, retries=_DEFAULT_RETRIES):
-    cls._RunAdbCmd(['kill-server'], timeout=timeout, retries=retries)
-
-  @classmethod
-  def StartServer(cls, timeout=_DEFAULT_TIMEOUT, retries=_DEFAULT_RETRIES):
-    # CPU affinity is used to reduce adb instability http://crbug.com/268450
-    cls._RunAdbCmd(['start-server'], timeout=timeout, retries=retries,
-                   cpu_affinity=0)
 
   # TODO(craigdh): Determine the filter criteria that should be supported.
   @classmethod