[telemetry] Add webdriver_ie_backend.

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 71038ecb60498c8224de6a8ff76d5c47cf8df851..144ed45b69ddb35f2ae5218ecd010f3340de774f 100644
--- a/tools/telemetry/telemetry/core/platform/win_platform_backend.py
+++ b/tools/telemetry/telemetry/core/platform/win_platform_backend.py
@@ -100,22 +100,46 @@ class WinPlatformBackend(desktop_platform_backend.DesktopPlatformBackend):
             'ReadTransferCount': io_stats['ReadTransferCount'],
             'WriteTransferCount': io_stats['WriteTransferCount']}
 
+  def KillProcess(self, pid, kill_process_tree=False):
+    # os.kill for Windows is Python 2.7.
+    cmd = ['taskkill', '/F', '/PID', str(pid)]
+    if kill_process_tree:
+      cmd.append('/T')
+    subprocess.Popen(cmd, stdout=subprocess.PIPE,
+                     stderr=subprocess.STDOUT).wait()
+
+  def GetSystemProcessInfo(self):
+    # [3:] To skip 2 blank lines and header.
+    lines = subprocess.Popen(
+        ['wmic', 'process', 'get',
+         'CommandLine,CreationDate,Name,ParentProcessId,ProcessId',
+         '/format:csv'],
+        stdout=subprocess.PIPE).communicate()[0].splitlines()[3:]
+    process_info = []
+    for line in lines:
+      if not line:
+        continue
+      parts = line.split(',')
+      pi = {}
+      pi['ProcessId'] = int(parts[-1])
+      pi['ParentProcessId'] = int(parts[-2])
+      pi['Name'] = parts[-3]
+      creation_date = None
+      if parts[-4]:
+        creation_date = float(re.split('[+-]', parts[-4])[0])
+      pi['CreationDate'] = creation_date
+      pi['CommandLine'] = ','.join(parts[1:-4])
+      process_info.append(pi)
+    return process_info
+
   def GetChildPids(self, pid):
     """Retunds a list of child pids of |pid|."""
-    creation_ppid_pid_list = subprocess.Popen(
-          ['wmic', 'process', 'get', 'CreationDate,ParentProcessId,ProcessId',
-           '/format:csv'],
-          stdout=subprocess.PIPE).communicate()[0]
     ppid_map = collections.defaultdict(list)
     creation_map = {}
-    # [3:] To skip 2 blank lines and header.
-    for creation_ppid_pid in creation_ppid_pid_list.splitlines()[3:]:
-      if not creation_ppid_pid:
-        continue
-      _, creation, curr_ppid, curr_pid = creation_ppid_pid.split(',')
-      ppid_map[int(curr_ppid)].append(int(curr_pid))
-      if creation:
-        creation_map[int(curr_pid)] = float(re.split('[+-]', creation)[0])
+    for pi in self.GetSystemProcessInfo():
+      ppid_map[pi['ParentProcessId']].append(pi['ProcessId'])
+      if pi['CreationDate']:
+        creation_map[pi['ProcessId']] = pi['CreationDate']
 
     def _InnerGetChildPids(pid):
       if not pid or pid not in ppid_map:
@@ -130,19 +154,9 @@ class WinPlatformBackend(desktop_platform_backend.DesktopPlatformBackend):
     return _InnerGetChildPids(pid)
 
   def GetCommandLine(self, pid):
-    command_pid_list = subprocess.Popen(
-          ['wmic', 'process', 'get', 'CommandLine,ProcessId',
-           '/format:csv'],
-          stdout=subprocess.PIPE).communicate()[0]
-    # [3:] To skip 2 blank lines and header.
-    for command_pid in command_pid_list.splitlines()[3:]:
-      if not command_pid:
-        continue
-      parts = command_pid.split(',')
-      curr_pid = parts[-1]
-      if pid == int(curr_pid):
-        command = ','.join(parts[1:-1])
-        return command
+    for pi in self.GetSystemProcessInfo():
+      if pid == pi['ProcessId']:
+        return pi['CommandLine']
     raise Exception('Could not get command line for %d' % pid)
 
   def GetOSName(self):