[telemetry] Add IPPET power monitor.

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

Index: tools/telemetry/telemetry/core/platform/win_platform_backend.py
diff --git a/tools/telemetry/telemetry/core/platform/win_platform_backend.py b/tools/telemetry/telemetry/core/platform/win_platform_backend.py
index 4597c40c7c6e84918b1ee20310b09a2d963d6e6c..5f723646bc5c85d9d56ed1f0ad2c24c6d0e0ed93 100644
--- a/tools/telemetry/telemetry/core/platform/win_platform_backend.py
+++ b/tools/telemetry/telemetry/core/platform/win_platform_backend.py
@@ -11,10 +11,14 @@ 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
@@ -23,9 +27,14 @@ from telemetry import decorators
 from telemetry.core import exceptions
 from telemetry.core.platform import desktop_platform_backend
 from telemetry.core.platform import platform_backend
+from telemetry.core.platform.power_monitor import ippet_power_monitor
 
 
 class WinPlatformBackend(desktop_platform_backend.DesktopPlatformBackend):
+  def __init__(self):
+    super(WinPlatformBackend, self).__init__()
+    self._power_monitor = ippet_power_monitor.IppetPowerMonitor(self)
+
   # pylint: disable=W0613
   def StartRawDisplayFrameRateMeasurement(self):
     raise NotImplementedError()
@@ -201,3 +210,32 @@ class WinPlatformBackend(desktop_platform_backend.DesktopPlatformBackend):
     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']
+
+  def CanMonitorPower(self):
+    return self._power_monitor.CanMonitorPower()
+
+  def CanMeasurePerApplicationPower(self):
+    return self._power_monitor.CanMeasurePerApplicationPower()
+
+  def StartMonitoringPower(self, browser):
+    self._power_monitor.StartMonitoringPower(browser)
+
+  def StopMonitoringPower(self):
+    return self._power_monitor.StopMonitoringPower()