oldpath is wchar_t, so use arraysize, not sizeof.

net/socket/ssl_test_util.cc

 // Copyright (c) 2006-2008 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.
 
 #include <string>
 #include <algorithm>
 
 #include "net/socket/ssl_test_util.h"
 
 #include "build/build_config.h"
@@ skipping 159 matching lines @@
 
 namespace {
 
 void AppendToPythonPath(const FilePath& dir) {
   // Do nothing if dir already on path.
 
 #if defined(OS_WIN)
   const wchar_t kPythonPath[] = L"PYTHONPATH";
   // FIXME(dkegel): handle longer PYTHONPATH variables
   wchar_t oldpath[4096];
-  if (GetEnvironmentVariable(kPythonPath, oldpath, sizeof(oldpath)) == 0) {
+  if (GetEnvironmentVariable(kPythonPath, oldpath, arraysize(oldpath)) == 0) {
     SetEnvironmentVariableW(kPythonPath, dir.value().c_str());
   } else if (!wcsstr(oldpath, dir.value().c_str())) {
     std::wstring newpath(oldpath);
     newpath.append(L":");
     newpath.append(dir.value());
     SetEnvironmentVariableW(kPythonPath, newpath.c_str());
   }
 #elif defined(OS_POSIX)
   const char kPythonPath[] = "PYTHONPATH";
   const char* oldpath = getenv(kPythonPath);
@@ skipping 241 matching lines @@
                   "certificate to your trusted roots for this test to work. "
                   "For more info visit:\n"
                   "http://dev.chromium.org/developers/testing\n";
     return false;
   }
 #endif
   return true;
 }
 
 }  // namespace net