Add Clang static analyzer to Clang toolchain defs in GN

build/toolchain/wrapper_utils.py

 # Copyright (c) 2016 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.
 
 """Helper functions for gcc_toolchain.gni wrappers."""
 
 import os
 import re
 import subprocess
 import shlex
@@ skipping 74 matching lines @@
   lines = text.splitlines()
   for ln in lines:
     match = _WHITELIST_RE.search(ln)
     if match:
       resource_id = int(match.group('resource_id'))
       used_resources.add(resource_id)
 
   return used_resources
 
 
-def CaptureCommandStderr(command):
+def CaptureCommandStderr(command, env=None):
   """Returns the stderr of a command.
 
   Args:
-    args: A list containing the command and arguments.
-    cwd: The working directory from where the command should be made.
+    command: A list containing the command and arguments.
     env: Environment variables for the new process.
   """
-  child = subprocess.Popen(command, stderr=subprocess.PIPE)
+  child = subprocess.Popen(command, stderr=subprocess.PIPE, env=env)
   _, stderr = child.communicate()
   return child.returncode, stderr