Remove psutil from the mini_installer test framework.

chrome/test/mini_installer/process_verifier.py

Index: chrome/test/mini_installer/process_verifier.py
diff --git a/chrome/test/mini_installer/process_verifier.py b/chrome/test/mini_installer/process_verifier.py
index a23605619bbe73b5fd1d202d34dc8d5242cbf8fd..3c4beb5a3c499a7a47c6f2db054cf2e4b9621241 100644
--- a/chrome/test/mini_installer/process_verifier.py
+++ b/chrome/test/mini_installer/process_verifier.py
@@ -2,8 +2,7 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-import psutil
-
+import chrome_helper
 import path_resolver
 
 
@@ -22,11 +21,8 @@ def VerifyProcesses(processes):
   """
   # Create a list of paths of all running processes.
   running_process_paths = []
-  for process in psutil.process_iter():
-    try:
-      running_process_paths.append(process.exe)
-    except psutil.AccessDenied:
-      pass
+  for _, process_path in chrome_helper.GetProcessIDAndPathPairs():
+    running_process_paths.append(process_path)
 
   for process_path, expectation in processes.iteritems():
     process_resolved_path = path_resolver.ResolvePath(process_path)