Revert of [telemetry] Read MSRs from a separate privileged process.

tools/telemetry/telemetry/core/platform/msr_server_win.py

Index: tools/telemetry/telemetry/core/platform/msr_server_win.py
diff --git a/tools/telemetry/telemetry/core/platform/msr_server_win.py b/tools/telemetry/telemetry/core/platform/msr_server_win.py
deleted file mode 100644
index 9ab48580b48d54b5d7bd7cab11ebce5a549ea801..0000000000000000000000000000000000000000
--- a/tools/telemetry/telemetry/core/platform/msr_server_win.py
+++ /dev/null
@@ -1,100 +0,0 @@
-# Copyright 2014 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-"""A server that serves MSR values over TCP. Takes a port as its sole parameter.
-
-The reference client for this server is msr_power_monitor.MsrPowerMonitor.
-
-Must be run as Administrator. We use TCP instead of named pipes or another IPC
-to avoid dealing with the pipe security mechanisms. We take the port as a
-parameter instead of choosing one, because it's hard to communicate the port
-number across integrity levels.
-
-Requires WinRing0 to be installed in the Python directory.
-msr_power_monitor.MsrPowerMonitor does this if needed.
-"""
-
-import argparse
-import ctypes
-import os
-import SocketServer
-import struct
-import sys
-
-
-WINRING0_STATUS_MESSAGES = (
-    'No error',
-    'Unsupported platform',
-    'Driver not loaded. You may need to run as Administrator',
-    'Driver not found',
-    'Driver unloaded by other process',
-    'Driver not loaded because of executing on Network Drive',
-    'Unknown error',
-)
-
-
-# The DLL initialization is global, so put it in a global variable.
-_winring0 = None
-
-
-class WinRing0Error(OSError):
-  pass
-
-
-def _WinRing0Path():
-  python_is_64_bit = sys.maxsize > 2 ** 32
-  dll_file_name = 'WinRing0x64.dll' if python_is_64_bit else 'WinRing0.dll'
-  return os.path.join(os.path.dirname(sys.executable), dll_file_name)
-
-
-def _Initialize():
-  global _winring0
-  if not _winring0:
-    winring0 = ctypes.WinDLL(_WinRing0Path())
-    if not winring0.InitializeOls():
-      winring0_status = winring0.GetDllStatus()
-      raise WinRing0Error(winring0_status,
-                          'Unable to initialize WinRing0: %s' %
-                          WINRING0_STATUS_MESSAGES[winring0_status])
-    _winring0 = winring0
-
-
-def _Deinitialize():
-  global _winring0
-  if _winring0:
-    _winring0.DeinitializeOls()
-    _winring0 = None
-
-
-def _ReadMsr(msr_number):
-  low = ctypes.c_uint()
-  high = ctypes.c_uint()
-  _winring0.Rdmsr(ctypes.c_uint(msr_number),
-                  ctypes.byref(low), ctypes.byref(high))
-  return high.value << 32 | low.value
-
-
-class MsrRequestHandler(SocketServer.StreamRequestHandler):
-  def handle(self):
-    msr_number = struct.unpack('I', self.rfile.read(4))[0]
-    self.wfile.write(struct.pack('Q', _ReadMsr(msr_number)))
-
-
-def main():
-  parser = argparse.ArgumentParser()
-  parser.add_argument('port', type=int)
-  args = parser.parse_args()
-
-  _Initialize()
-  try:
-    SocketServer.TCPServer.allow_reuse_address = True
-    server_address = ('127.0.0.1', args.port)
-    server = SocketServer.TCPServer(server_address, MsrRequestHandler)
-    server.serve_forever()
-  finally:
-    _Deinitialize()
-
-
-if __name__ == '__main__':
-  main()