ignore null value in proxy servers and bypass list capabilities

chrome/test/webdriver/webdriver_capabilities_parser.cc

 // Copyright (c) 2011 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 "chrome/test/webdriver/webdriver_capabilities_parser.h"
 
 #include "base/base64.h"
 #include "base/file_util.h"
 #include "base/format_macros.h"
 #include "base/logging.h"
@@ skipping 302 matching lines @@
   const char kSslProxy[] = "sslProxy";
 
   std::set<std::string> proxy_servers_options;
   proxy_servers_options.insert(kFtpProxy);
   proxy_servers_options.insert(kHttpProxy);
   proxy_servers_options.insert(kSslProxy);
 
   Error* error = NULL;
   Value* option = NULL;
   bool has_manual_settings = false;
-  if (options->Get(kNoProxy, &option)) {
+  if (options->Get(kNoProxy, &option) && !option->IsType(Value::TYPE_NULL)) {
     error = ParseNoProxy(option);
     if (error)
       return error;
     has_manual_settings = true;
   }
 
   std::vector<std::string> proxy_servers;
   std::set<std::string>::const_iterator iter = proxy_servers_options.begin();
   for (; iter != proxy_servers_options.end(); ++iter) {
-    if (options->Get(*iter, &option)) {
+    if (options->Get(*iter, &option) && !option->IsType(Value::TYPE_NULL)) {
       std::string value;
       if (!option->GetAsString(&value))
         return CreateBadInputError(*iter, Value::TYPE_STRING, option);
       has_manual_settings = true;
       // Converts into Chrome proxy scheme.
       // Example: "http=localhost:9000;ftp=localhost:8000".
       if (*iter == kFtpProxy)
         value = "ftp=" + value;
       if (*iter == kHttpProxy)
         value = "http=" + value;
@@ skipping 59 matching lines @@
   } else {
     if (!file_util::WriteFile(path, data.c_str(), data.length())) {
       *error_msg = "Could not write file";
       return false;
     }
   }
   return true;
 }
 
 }  // namespace webdriver