Revert recent changes to base::Value

chrome/test/automation/tab_proxy.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/automation/tab_proxy.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "base/string16.h"
@@ skipping 248 matching lines @@
 }
 
 bool TabProxy::ExecuteAndExtractString(const std::wstring& frame_xpath,
                                        const std::wstring& jscript,
                                        std::wstring* string_value) {
   Value* root = NULL;
   bool succeeded = ExecuteAndExtractValue(frame_xpath, jscript, &root);
   if (!succeeded)
     return false;
 
-  DCHECK(root->AsList());
+  DCHECK(root->IsType(Value::TYPE_LIST));
   Value* value = NULL;
-  succeeded = root->AsList()->Get(0, &value);
+  succeeded = static_cast<ListValue*>(root)->Get(0, &value);
   if (succeeded) {
     string16 read_value;
     succeeded = value->GetAsString(&read_value);
     if (succeeded) {
       // TODO(viettrungluu): remove conversion. (But should |jscript| be UTF-8?)
       *string_value = UTF16ToWideHack(read_value);
     }
   }
 
   delete root;
   return succeeded;
 }
 
 bool TabProxy::ExecuteAndExtractBool(const std::wstring& frame_xpath,
                                      const std::wstring& jscript,
                                      bool* bool_value) {
   Value* root = NULL;
   bool succeeded = ExecuteAndExtractValue(frame_xpath, jscript, &root);
   if (!succeeded)
     return false;
 
   bool read_value = false;
-  DCHECK(root->AsList());
+  DCHECK(root->IsType(Value::TYPE_LIST));
   Value* value = NULL;
-  succeeded = root->AsList()->Get(0, &value);
+  succeeded = static_cast<ListValue*>(root)->Get(0, &value);
   if (succeeded) {
     succeeded = value->GetAsBoolean(&read_value);
     if (succeeded) {
       *bool_value = read_value;
     }
   }
 
   delete value;
   return succeeded;
 }
 
 bool TabProxy::ExecuteAndExtractInt(const std::wstring& frame_xpath,
                                     const std::wstring& jscript,
                                     int* int_value) {
   Value* root = NULL;
   bool succeeded = ExecuteAndExtractValue(frame_xpath, jscript, &root);
   if (!succeeded)
     return false;
 
   int read_value = 0;
-  DCHECK(root->AsList());
+  DCHECK(root->IsType(Value::TYPE_LIST));
   Value* value = NULL;
-  succeeded = root->AsList()->Get(0, &value);
+  succeeded = static_cast<ListValue*>(root)->Get(0, &value);
   if (succeeded) {
     succeeded = value->GetAsInteger(&read_value);
     if (succeeded) {
       *int_value = read_value;
     }
   }
 
   delete value;
   return succeeded;
 }
@@ skipping 520 matching lines @@
                                                       json));
 }
 
 void TabProxy::FirstObjectAdded() {
   AddRef();
 }
 
 void TabProxy::LastObjectRemoved() {
   Release();
 }