Revert recent changes to base::Value

chrome/test/webdriver/webdriver_session.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_session.h"
 
 #include <sstream>
 #include <vector>
 
 #include "base/command_line.h"
@@ skipping 1222 matching lines @@
   CHECK(root_element.is_valid());
 
   class FindElementsParser : public ValueParser {
    public:
     explicit FindElementsParser(std::vector<ElementId>* elements)
         : elements_(elements) { }
 
     virtual ~FindElementsParser() { }
 
     virtual bool Parse(base::Value* value) const OVERRIDE {
-      ListValue* list = value->AsList();
-      if (!list)
+      if (!value->IsType(Value::TYPE_LIST))
         return false;
+      ListValue* list = static_cast<ListValue*>(value);
       for (size_t i = 0; i < list->GetSize(); ++i) {
         ElementId element;
         Value* element_value = NULL;
         if (!list->Get(i, &element_value))
           return false;
         if (!SetFromValue(element_value, &element))
           return false;
         elements_->push_back(element);
       }
       return true;
@@ skipping 152 matching lines @@
 Error* Session::GetAppCacheStatus(int* status) {
   return ExecuteScriptAndParse(
       current_target_,
       atoms::asString(atoms::GET_APPCACHE_STATUS),
       "getAppcacheStatus",
       new ListValue(),
       CreateDirectValueParser(status));
 }
 
 }  // namespace webdriver