[telemetry] Add IPPET power monitor.

tools/telemetry/telemetry/core/platform/win_platform_backend.py

 # Copyright 2013 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.
 
 import collections
 import ctypes
 import platform
 import re
 import subprocess
 import time
 try:
   import pywintypes  # pylint: disable=F0401
   import win32api  # pylint: disable=F0401
+  from win32com.shell import shell  # pylint: disable=F0401
+  from win32com.shell import shellcon  # pylint: disable=F0401
   import win32con  # pylint: disable=F0401
   import win32process  # pylint: disable=F0401
 except ImportError:
   pywintypes = None
+  shell = None
+  shellcon = None
   win32api = None
   win32con = None
   win32process = None
 
 from telemetry import decorators
 from telemetry.core import exceptions
 from telemetry.core.platform import desktop_platform_backend
 from telemetry.core.platform import platform_backend
 
 
@@ skipping 166 matching lines @@
                   ('ThreadCount', ctypes.c_ulong)]
 
       def __init__(self):
         self.size = ctypes.sizeof(self)
         super(PerformanceInfo, self).__init__()
 
     performance_info = PerformanceInfo()
     ctypes.windll.psapi.GetPerformanceInfo(
         ctypes.byref(performance_info), performance_info.size)
     return performance_info
+
+  def LaunchApplication(
+      self, application, parameters=None, elevate_privilege=False):
+    """Launch an application. Returns a PyHANDLE object."""
+
+    # Use ShellExecuteEx() instead of subprocess.Popen()/OpenProcess() to
+    # elevate privileges. A new console will be created if the new process has
+    # different permissions than this process.
+    proc_info = shell.ShellExecuteEx(
+        fMask=shellcon.SEE_MASK_NOCLOSEPROCESS | shellcon.SEE_MASK_NO_CONSOLE,
+        lpVerb='runas' if elevate_privilege else '',
+        lpFile=application,
+        lpParameters=' '.join(parameters) if parameters else [],
+        nShow=win32con.SW_HIDE)
+    if proc_info['hInstApp'] <= 32:
+      raise Exception('Unable to launch %s' % application)
+    return proc_info['hProcess']